Yakaki, Makio
Real Name: Makio Yakaki
Occupation: Lawyer, employed by Fantastic Four Inc.
Other Aliases: None
Place of Birth: Unrevealed
Marital Status: Single
Known Relatives: None
Group Affiliation: None
Source of Powers: None
Powers/Abilities: Experienced in legal matters
First Appearance: Fantastic Four Vol.1 #373
List of Appearances:
Fantastic Four Vol.1 #373 (assigned with Matt Murdock by the Invisible Woman to deal with the Empire State University lawsuit)
Fantastic Four Vol.1 #375 (with Matt Murdock, presented compensation package to Empire State University)
Fantastic Four Vol.1 #376 (with Murdock, informed the Fantastic Four that Empire State University had been satisified, by selling off some of Reed Richards' patents)

Yandroth
See: Appendix; Other Dimensions; Yandroth

Yankee Clipper I
Real Name: Patrick "Pat" Carney
Occupation: Adventurer, former scientist and football player
Other Aliases: None
Place of Birth: Unrevealed
Marital Status: Single
Known Relatives: Tim Carney (younger brother, aka Mr. Justice, deceased)
Group Affiliation: The First Line
Source of Powers: None; superhuman strength derived from belt given to him by Cassandra Locke
First Appearance: Marvel: The Lost Generation #4
List of Appearances:
Marvel: The Lost Generation #4 (with the First Line, fought Howler and Chimera I, witnessed murder of Liberty Girl; encountered Cassandra Locke, hurled into the future by contact with her)
Marvel: The Lost Generation #3 (with the First Line and the Hipster, battled the forces of the Yellow Claw)
Marvel: The Lost Generation #2 (with Liberty Girl, Black Fox and the Monster Hunters, battled mutated scientist; with Liberty Girl, Nightingale and Effigy, founded the First Line)
Marvel: The Lost Generation #1 (first met Cassandra Locke, witnessed her death, received her time-travel belt; after being hurled into the future, met Mr. Justice, aided by Pixie in establishing a new life for himself; years later, with Pixie, learnt of new Skrull activity)

Yashida, Mariko
Real Name: Mariko Yashida
Occupation: Former head of the Yashida clan in Tokyo, Japan
Other Aliases: None
Place Of Birth: Agarashima, Japan
Marital Status: Widowed
Known Relatives: Shingen Harada (father, deceased), Noburu-Hideki (husband, deceased), Kenuichio Harada (half-brother, aka Silver Samurai), Shiro Yoshida (cousin, aka Sunfire), Leyu Yoshida (cousin, aka Sunpyre, deceased), Tomo Yashida (cousin, deceased), Saburo Yashida (cousin, deceased), Amiko (foster daughter)
Group Affiliation: Head of the Yashida clan
Source Of Powers: None
Cause Of Death: Fatally poisoned
First Appearance: Uncanny X-Men #118
List Of Appearances;
Uncanny X-Men #118
Marvel Comics Presents #43 (flashback)
Wolverine Vol.2 #57 (poisoned, died)
Final Appearance: Wolverine Vol.2 #57

Yasir
Real Name: Yasir (full name unrevealed)
Occupation: Terrorist
Other Aliases: Unrevealed
Place of Birth: Unrevealed
Marital Status: Unrevealed
Known Relatives: None
Group Affiliation: Revolutionary Jihad
Source of Powers: None
Powers/Abilities: The leader and the brain of the team, he will use any means at hand to optain his goals
Cause of Death: Gunned down by Punisher
First Appearance: Punisher Vol.2 #6
History:
List of Appearances:
Punisher Vol.2 #6 (comes to the UNISYM compound in South Jersey, "Manny" and one of his men meets with Yasir and Ahmed. Yasir pays "Manny" a million dollars for some plutonium. Suddenly the meeting is interrupted by Punisher but the men tries to gun him down, but he meneges to escape. Manny yells at Yasir, telling him that the man (Punisher) who just attacked them must have followed him, Yasir tells him that's impossible, and that it's his own fault for starting the vendetta against the Rosetti brothers. When Punisher attacks the compound and the Rosetti's follows, Ahmed and Yasir leaves the place)
Punisher Vol.2 #7 (Manny tells Punisher and Rose Kugel about Ahmed, and tells them that the Revolutionary Jihad plans to use the plutonium at the Gallagher building to take down the building as well as a nearby theatre where Mr. Mecozzi is present alongside the mayor and the secretary general of the UN. At the Gallagher Plaza uses a crane in order to place plutonium near a theatre full of people, including the general secretary of the U.N and Mr. Mecozzi of the Mecozzi Crime Family. Punisher and Rose Kugel shows up. Punisher captures Yasir, but Yasir tells him that he is too late to stop them now. Yasir then fires his gun and hits Punisher in the shoulder, Punisher then guns down Yasir. On videotape, Yasir is seen announcing the words of Revolutionary Jihad, saying "death to the enemies of islam! long live the Revolutionary Jihad")
Final Appearance: Punisher Vol.2 #7

Yashonka
See: Appendix, M.U Countries, Yashonka

Yekaterina
Real Name: Yekaterina (last name unrevealed)
Occupation: Prostitute
Other Aliases: None
Place of Birth: Chernobyl, USSR (now Ukraine)
Marital Status: Unnamed mother
Known Relatives: None
Group Affiliation: None
Source of Powers: Genetic mutation
Powers/Abilities: Yekaterina is a mutant with the ability to change her shape and form
First Appearance: Marvel Knights: Spider-Man #2
History:
List of Appearances:
Marvel Knights: Spider-Man #2

Yellow Claw
Real Name: Unrevealed
Occupation: Would-be conqueror
Other Aliases: (former) Bhagwan Sri Ananda
Place Of Birth: Somewhere in mainland China
Marital Status: Married many times
Known Relatives: Suwan (grand-niece, deceased)
Group Affiliation: Leader of own organisation
Source Of Powers: (physical powers): Manipulation of the forces of magic (mental powers) unknown
Powers: Extraordinary genius, peak human agility and reflexes, athletic strenght, stamina and durability, has the ability to manipulate the forces of magic to create certain effects like reanimating the dead, also the ability to cast extremely realistic illusions. Has the mental power to cause people pain and perhaps control them. Once used an elixir of his own creation to increase his lifespan, he's a genius in alchemy
First Appearance: Yellow Claw #1
List Of Appearances;
Yellow Claw #1-4
Strange Tales Vol.1 #160 (not seen, only telepathic voice)
Captain America Vol.1 #164-167 (fought Captain America, Falcon, Nick Fury and SHIELD, destroyed Suwan)
Iron Man Vol.1 #69-71, 75, 77 ("Super-Villian War")
Nova Vol.1 #13 (in the shadows)
Nova Vol.1 #14 (in the shadows)
Nova Vol.1 #16 (identity revealed)
Nova Vol.1 #17
Nova Vol.1 #18 (defeated by Nova, but escaped)
Avengers Vol.1 #204-205
Marvel Fanfare #31-32
Nick Fury Agent Of SHIELD Vol.2 #12-14 (teamed with Madame Hydra, Hydra Affair, seemingly killed)
Marvel: Lost Generation #7 (flashback)
Marvel: Lost Generation #3 (flashback)
X-Men: Hidden Years #18 (flashback)

Yellow Claw (imposter)
Real Name: Inapplicable (robot version of true Yellow Claw)
Occupation: Robot look-a-like of original Yellow Claw
Other Aliases: None
Place Of Creation: ?
Creator: Yellow Claw
Group Affiliation: None
Source Of Powers: Robot version of original Yellow Claw
Powers: Enhanced strenght
Cause Of Destruction: ?
First Appearance: Strange Tales Vol.1 #161
List Of Appearances;
Strange Tales Vol.1 #161-167
Final Appearance: Strange Tales Vol.1 #167

Yellowjacket I
Real Name: Henry J. Pym
Occupation: Biochemist, adventurer
Other Aliases: (current): Yellowjacket (former) Ant-Man, Giant-Man, Goliath, Gigantus, the Scientific Advneturer
Place Of Birth: Elmsford, New York
Marital Status: Married twice (once widowed, once divorced)
Known Relatives: Unnamed mother (deceased), Maria Trovaya Pym (1.wife, deceased), Janet Van-Dyne (2.wife, aka Wasp, divorced), unnamed 1.father-in-law (deceased), Vernon Van Dyne (2.father-in-law, deceased), unnamed 2.mother-in-law (deceased)
Group Affiliation: Avengers. Formerly Defenders, Queen's Vengeance
Source Of Powers: Invented his own shrinking gas, which later was expanded so he could also grow
Powers (as Antman): Could shrink to ant-size + had a helmet enabling him to communicate with insects (as Giant-man/Goliath): Could grow to gigantic height (as Yellowjacket): Could shrink to insect size + had  electric stingers in his gloves + wore the same helmet as he did as Ant-Man enabling him to communicate with insects
First Appearance (as Henry Pym): Tales To Astonish #27
First Appearance (as Ant-Man): Tales To Astonish #35
First Appearance (as Giant-Man): Tales To Astonish #49
First Appearance (as Goliath): Avengers Vol.1 #28
First Appearance (as Yellowjacket): Avengers Vol.1 #59
List Of Appearances;
Tales To Astonish #27 (Finally ready to test his serum, he uses a chair as a terst object, and the test is successfull, the chair descreases in size. He then tries to test it on himself, shrinking to ant-like size. Afraid that he can't get the antidote, he runs around the room, and suddenly sees himself out in the garden, there he is attacked by ants, one of the ants actually helps him, but the other ants attacks him. Hank manages to defeat one of the ants, and escapes. With the help of the ant who helped him before, he arrivesback at the room again, and finds the antidote, and returns to his normal size. Hank then decides to get rid of the serum, but throwing it into the sink. Later at the next science convention, he tells his colleagues, that they were right, the serum wasn't working, and it was a waste of time. In flashback; Hank Pym is present at a science convention, where his collegues are telling him that his theories never works, and that he is wasting their time. Hank tells them that his latest project works, but he won't tell them about it yet, and leaves, he then spends months in his laboratory, testing serum which is to work as a size-changing serum)
Tales To Astonish #35-43
Tales To Astonish #44 (introduced to Vernon Van Dyne and his daughter Janet. In flashback meeting, marriage and death of first wife Maria)
Tales To Astonish #45-48
Avengers Vol.1 #1 (fought Loki helped found Avengers)
Tales To Astonish #49 (took on Giant-man identity)
Tales To Astonish #50-69
Avengers Vol.1 #2-15
Amazing Spider-Man Annual 1 (as Giant-Man, Cameo appearance. Stops a group of criminals with Wasp.)
Amazing Spider-Man Annual 3 (with the Avengers tests Spider-Man for membership)
Avengers Vol.1 #10 (fights Goliath)
Avengers Vol.1 #16 (alongisde other founding members left Avengers)
Avengers Vol.1 #28 (first appeared as Goliath)
Avengers Annual 1
Avengers Vol.1 #45 (with the Avengers fought Super-Adaptoid)
Avengers Vol.1 #59 (first appeared as Yellowjacket)
Avengers Vol.1 #60 (revealed identity, fought Circus of Crime, married Janet Van Dyne)
Captain America Vol.1 #221 (flashback to time before the original Avengers split)
Captain America Vol.1 #224
Avengers Vol.1 #230 (decided to give up his superhero life, and leave Avengers)
Amazing Spider-Man Vol.1 #242 (flashback, to fight with Mad Thinker)
West Coast Avengers Vol.2 #36 (found long thought dead wife Maria Trovaya Pym)
Solo Avengers #8 (Hank Pym comes to see Lieutenant Ishmael who has called for him. Lt. Ishmael tells him that there has been a serieso f robberies commited by someone who can change size, and that's why he has called Hank Pym. Hank says he wants to help find the one responsible. Hank solves the puzzle when he stumbles upon the letters in the places robbed New century labs; Entwiler jewelers and Morganstern electronics N-E-M, and he thinks the next place to be robbes is Eckman's electronics, revealing the first four letters of his old enemy Dr. Nemesis. He rushed to Eckman's Electronics only to learn that he is correct. He fights his enemy and defeats him, thereby clearing his own name. Dr. Nemesis is taken away by the police)
Solo Avengers #16 (Truth about "Maria Pym" discovered)
Avengers Spotlight #23 (watches Vision on a tv show, laughs)
Avengers Spotlight #24 (seen in flashback)
Marvel Comics Presents #2 (flashback)
Namor, The Sub-Mariner #13 (flashback, alongside Avengers fought Hulk and Namor)
Marvel Comics Presents #38 (flashback)
Marvel Comics Presents #43
Marvel Comics Presents #45
Spider-Man Unlimited #18 (Appears in flashback working with Tony Stark and Reed Richards to remove Doctor Octopus’ arms.)
Captain America Vol.1 #444
Avengers Vol.3 #27 (rejoined Avengers)
Avengers #1½ (With the Avengers, encounters Dr. Doom. Becomes Giant-Man for the first time.)
Avengers Vol.3 #71 (with Janet in Vegas, ask her to marry him, turned down, fights and defeats Whirlwind)
Avengers Vol.3 #82
Avengers/Thunderbolts #3
She-Hulk Vol.3 #5
She-Hulk Vol.3 #6 (at Timely Plaza discussing the "Big House" facility, discovers that alot of supervillains has escaped, with She-Hulk fought and defeated them)
Beyond #1
Beyond #2

Yellowjacket II
Real Name: Rita DeMara
Occupation: Adventure, former professional criminal
Other Aliases: None
Place Of Birth: Unrevealed
Marital Status: Presumed single
Known Relatives: None
Group Affiliation: Former member of Masters Of Evil IV-V, Guardians Of The Galaxy
Source Of Powers: No superpowers, used battlesuit (stolen from Hank Pym)
Abilities: Expertise in cybernetic technology, fair hand-to-hand combatant, used subatomic "Pym Particles" (shrinking gas) to shrink in size to ½ inch, battlesuit also had "disruptor sting" blasters enabling her to shoot electrical bolts from her gloves
Cause Of Death: Seemingly killed by Iron Man I
First Appearance: Avengers Vol.1 #264
List Of Appearances;
Avengers Vol.1 #264 (fought Wasp)
Avengers Vol.1 #271 (recruited for Masters Of Evil IV)
Avengers Vol.1 #273-276 (Siege of the Mansion, Masters Of Evil IV)
Solo Avengers #12 (freed from prison by Fixer turned against him, felt in love with Black Knight III)
Avengers Annual 17 (Evolutionary War)
Captain America Vol.1 #389-391 (with Suprema's Femizons)
Guardians Of The Galaxy #28-29 (joined Masters Of Evil V, turned against them)
Guardians Of The Galaxy Annual 4
Avengers: The Crossing #1
Final Appearance: Avengers: The Crossing #1

Yeti I
Real Name: Kaliban
Occupation: Guardian of the Great Refuge
Other Aliases: Mr. Garrow
Place Of Birth: Attilan, The Great Refuge
Marital Status:
Known Relatives:
Group Affiliation: The Inhumans, First Line
Source Of Powers: Exposure to Terrigan Mist
Powers: Superhuman strength
First Appearance: Fantastic Four Vol.1 #99
History:
List Of Appearances;
Fantastic Four Vol.1 #99
Marvel: The Lost Generation #12 (gone insane, sure that his love a female skrull isn't dead, seemingly killed when Pixie destroyed all the skrullian spaceships)
Marvel: The Lost Generation #11 (revealed how he met the female skrull)
Marvel: The Lost Generation #10
X-Men: Hidden Years #16 (flashback)
Marvel: The Lost Generation #7
Marvel: The Lost Generation #4 (as Mr. Garrow)

Yeti II
Real Name: Unrevealed
Occupation: Unrevealed
Other Aliases: None
Place Of Birth: Unrevealed
Marital Status: Unrevealed
Known Relatives: None
Group Affiliation: None
Source Of Powers: Unrevealed
Powers: Superhuman strength
First Appearance: Black Panther Vol.1 #5
List Of Appearances:
Black Panther Vol.1 #5 (attacks Black Panther and Abner Little, defeated by T'Challa)

Yirbek
See: Appendix, Alien Races, Yirbek

Ymir
See: Appendix; Other Dimensions; Ymir

Yodinski, Mrs.
Real Name: Yodinski (first name unrevealed)
Occupation: Unrevealed
Other Aliases: None
Place of Birth: Unrevealed
Marital Status: Unrevealed
Known Relatives: None
Group Affiliation: None
Source of Powers: None
Powers/Abilities:
First Appearance: Deadline #4
List of Appearances:
Deadline #4 (Tells Kat Farrell that she was happy to see her boyfriend in her apartment. Identifies her “boyfriend” as Paul Swanson, and Kat is able to arrest him for breaking and entering.)

Yondu
See: Appendix; Future, Guardians; Yondu

Yoof
Real Name: Yoof
Occupation: Student at the Intergalactic Institute of Advanced Learning
Other Aliases: None
Place of Birth: Yrest ("alien" planet)
Marital Status: Presumed single
Known Relatives: None
Group Affiliation: Pupil at the SHIELD obiter
Source of Powers: Yoof is a member of the alien race of Yrds
Powers/Abilities: Like all Yrds, Yoof has a horn protruding from his forehead. In less civilized times, the Yrds used their horns as weapons
First Appearance: Avengers Spotlight #24
History: Yoof was born on the planet Yrest, the homeplanet of the race of Yrds (See: Appendix, Alien Races, Yrds)
List of Appearances:
Avengers Spotlight #24 (revealed to be behind the accident which gave Firebird her powers)

Yorkes, Dale
Real Name: Dale Yorkes
Occupation: Timetraveller
Other Aliases: None
Place Of Birth: Unrevealed
Marital Status: Married
Known Relatives: Stacey Yorkes (wife, deceased), Gertrude Yorkes (daughter, aka Arsenic)
Group Affiliation: The Pride
Source Of Powers: None
Powers/Abilities: ?
Cause of Death: Blasted by a Gibborim
First Appearance: Runaways Vol.1 #1
List Of Appearances;
Runaways Vol.1 #1
Runaways Vol.1 #13
Runaways Vol.1 #15
Runaways Vol.1 #16
Runaways Vol.1 #17 (presumed killed in final battle with the Gibborims)
Final Appearance: Runaways Vol.1 #17

Yorkes, Stacey
Real Name: Stacey Yorkes
Occupation: Timetraveller
Other Aliases: None
Place Of Birth: Unrevealed
Marital Status: Married
Known Relatives: Dale Yorkes (husband, deceased), Gertrude Yorkes (daughter, aka Arsenic)
Group Affiliation: The Pride
Source Of Powers: None
Powers/Abilities: ?
Cause of Death: Blasted by a Gibborim
First Appearance: Runaways Vol.1 #1
List Of Appearances;
Runaways Vol.1 #1
Runaways Vol.1 #13
Runaways Vol.1 #15
Runaways Vol.1 #16
Runaways Vol.1 #17 (presumed killed in final battle with the Gibborims)
Final Appearance: Runaways Vol.1 #17

Young, Max
Real Name: Max Young
Occupation: Assistant
Other Aliases: None
Place of Birth: Unrevealed
Marital Status: Unrevealed
Known Relatives: None
Group Affiliation: None
Source of Powers: None
Powers/Abilities: None
First Appearance: Amazing Spider-Man Vol.1 #37
List of Appearances:
Amazing Spider-Man Vol.1 #37 (aided Mendell Stromm after his release from prison, assisted him in his assaults on Osborn Industries)

Yrd
See: Appendix, Alien Races, Yrds

Yrdisis
Real Name: Yrdisis
Occupation: Artist
Other Aliases: None
Place of Birth: Deviant Lemuria
Marital Status: Single
Known Relatives: None
Group Affiliation: The Deviants
Source of Powers: None
First Appearance: Eternals Vol.2 #5
List Of Appearances:
Eternals Vol.2 #5 (spied on Ghaur for Kro)
Eternals Vol.2 #7 (first met Khoryphos)
Eternals Vol.2 #10-12 (aided Eternals in defeating Ghaur)
Eternals: The Herod Factor (with Khoryphos, smuggled Deviants out of Lemuria)
Fantastic Four Unlimited #10 (captured by Weird Sisters, rescued by Eternals and Fantastic Four)

Yuc, Joon Moon
Real Name: Joon Moon Yuc
Occupation: Leader of religious cult
Other Aliases: None
Place of Birth: Unrevealed
Marital Status: Unrevealed
Known Relatives: None
Group Affiliation: The Yucchies religious cult, Ally of Dr. Reich
Source of Powers: The manipulation of magical energies
Powers: Reverend Yuc could invoke magical spells, the full extent of which was unknown.
First Appearance: Howard the Duck Vol.1 #6
List of Appearances:
Howard the Duck Vol.1 #6 (Tries to buy the Dragonworth mansion in Idle Hands, Pennsylvania)
Howard the Duck Vol.1 #7 (Seemingly killed when Dragonwoth Mansion explodes)
Howard the Duck Vol.1 #13 (Revealed to be alive. Allies himself with Dr. Reich and tries to perform a ritual on Winda Wester.)
Howard the Duck Vol.1 #14 (Lets Dr. Reich move his operation to his private university.)

Yucoya-Tzin
Real Name: Yucoya-Tzin
Occupation: Elder priest of an Aztec tribe; would-be conqueror
Other Aliases: None
Place of Birth: Mexico
Marital Status: Unrevealed
Known Relatives: None
Group Affiliation: None
Source of Powers: None
First Appearance: Strange Tales Vol.1 #88
List of Appearances:
Strange Tales Vol.1 #88 (gave Frank Johnson magical paints that bring objects to life; had Johnson paint Zzutak, planned to use Zzutak to conquer the earth; planned halted when Zzutak buried in fight with a second monster)
Fantastic Four Unlimited #7 (captured Johnson's son Cal to force him to revive Zzutak; revived dead monsters Blip, Grottu, Two-Headed Thing and Rorgg to delay Fantastic Four; Zzutak again defeated by the second monster)

Yukio
Real Name: Yukio (full name unrevealed)
Occupation:
Other Aliases:
Place of Birth:
Marital Status:
Known Relatives:
Group Affiliation: Mutant Underground, former employee of Lord Shingen
Source of Powers:
Powers/Abilities:
First Appearance: Wolverine Vol.1 #1
History:
List of Appearances:
Wolverine Vol.1 #1

Yukon Jack
Real Name: Yukotujakzurjimozoata
Occupation: Professional adventurer, former bartender
Other Aliases: Unrevealed
Place Of Birth: Unrevealed
Marital Status: Single
Known Relatives: Unnamed father
Group Affiliation: Alpha Flight
Source Of Powers: 
Powers:
First Appearance: Alpha Flight Vol.3 #1
History:
List of Appearances:
Alpha Flight Vol.3 #1
Alpha Flight Vol.3 #2
Alpha Flight Vol.3 #3 (Walter Langkowski informs his new team about the history of the Plodex)
Alpha Flight Vol.3 #4
Alpha Flight Vol.3 #5
Alpha Flight Vol.3 #6 (the "new" Alpha Flight members discovers the "old" members are alive. The old members leaves Earth to help the Plodex rebuild their new society, while the "new" team begins their mission as the newest Canadian superhero team)
Alpha Flight Vol.3 #7

Yuri
Real Name: Yuri (last name unrevealed)
Occupation: Guard at the Soviet Embassy
Other Aliases: None
Place of Birth: Somewhere the the former U.S.S.R
Marital Status: Unrevealed
Known Relatives: None
Group Affiliation: None
Source of Powers: None
Powers/Abilities:
First Appearance: Solo Avengers #7
History:
List of Appearances:
Solo Avengers #7 (one of the guards at the soviet embassy, when Oksana Bolinhinko were visiting the USA. Knocked out by Black Widow)

Yuri
Real Name: Yuri (full name unrevealed)
Occupation: Terrorist
Other Aliases: None
Place Of Birth: Unrevealed location in U.S.S.R (now Russia)
Marital Status: Unrevealed
Known Relatives: None
Group Affiliation: Peristrike Force
Source Of Powers: None
First Appearance: Darkhawk #17
List Of Appearances:
Darkhawk #17

Yussaf, Jellim
Real Name: Jellim Yussaf
Occupation: Plunderer
Other Aliases: None
Place Of Birth: Egypt
Marital Status: Unrevealed
Known Relatives: None
Group Affiliation: None
Source Of Powers: None
First Appearance: Moon Knight Vol.1 #28
List Of Appearances:
Moon Knight Vol.1 #28 (attempted to plunder tomb, stopped by Moon Knight)

Yvon
Real Name: Yvon
Occupation: Assistant to Dakota North
Other Aliases: None
Place Of Birth: Unrevealed location in France
Marital Status: Unrevealed
Known Relatives: None
Group Affiliation: North Security
Source Of Powers: None
First Appearance: Dakota North #3
History:
List Of Appearances:
Dakota North #3 (met Dakota in Charles de Gaulle airport)