Onslaught was a creation of Magneto as well as Alpha the Ultimate Mutant. I consider them part of the family cuz technically he's their father. And only alt-reality characters included are Nocturne, which has had pretty significant ties to 616, and Magnus who was in Exiles. You can consider North to be alt-reality but since its a potential timeline I included him. Zala Dane is a mystery child that's why I put a question mark because its been hinted she can be Magnetos daughter but hasn't been confirmed.