* Mystique, Sabretooth, Nightcrawler, and Rogue are all mutants.  Nightcrawler's father, and Graydon Creed are both human

Last time I got close to her when she was in a mood like this, I…well we…let's just say nine months later little Graydon was born." - Sabretooth   talking about Mystique's rage. - X-Factor #134       

"For the first few years we were together...ah would have sworn on my life that she cared for me...that she'd never do nuthin' to harm me...but if ya want to be realistic - she had me trussed up in uniform and sluggin' it out against Ms. Marvel among others. Not exactly the nurturing mama ah always guess ah pretended she was." - Rogue telling Nightcrawler about Mystique. - X-Men Unlimited #4     

"Friend? I'm afraid we're much more than that, Kurt. You and I…? I just learned recently...we're brothers." - Graydon revealing his family connection. - X-Men Unlimited #4   

"Of all the affronts to my lineage that I have had to bear - from the fact my father is Sabretooth - to the realization my mother was Mystique...I find nothing more repulsive than knowing I share the same blood as you!" - Graydon fighting with Kurt. - X-Men Unlimited #4