Board Thread:Suggestions/@comment-5504437-20170819091521/@comment-1409931-20170903052147

I'd say they should be kept off UNLESS those relationships are actually a central aspect of the character's identity. IE, Rachel acknowledges the Scott and Jean of the Prime universe as her parents, even though she was born on Earth-811. By contrast, while Gabby once called Old Man Logan her "interdimensional dystopian future grandpa," it's not significant to her character identity, while Laura outright denies any connection and refuses to acknowledge him as "her" Logan.

Listing AU relatives just because the characters have interacted is opening a huge can of worms as you've pointed out. There should be a conscious recognition that these characters are family by the characters in question, and that it's a significant aspect of their character identity.