To me, Stephenie looks like her paternal grandparents, or at least one of them, could be from the Mithrilen family. They are the only family in DV that has Stephenie's dark rainbow skin slider, as well as sharing both her hair and eye color.
Calvin, on the other hand, seemed like he could be related to Martin or Liam Eames. Do you know if any of these went right? Or am I just plain crap in determining genetics?