Well, the newest Zatara is Zatanna's cousin, so that'd make him the nephew of the original. He kind of reminds me of Johnny Sorrow or the Shade, but I don't think those are good guesses either.

I'd guess the second one would be Ms. America's grandchild (is that a boy or a girl? I can't tell for sure.), but her history is probably still connected to Fury unless there's been another retcon.

So, yeah, not much to add here. lol