It was quite disturbing how Kaname's mother looked like Yuuki a lot. And Yuuki had her memory erased.
I wonder if it's the reason for Kaname's parents death.

Also we do not get to see lots of purebloods in the show, must be hard to preserve the kind. We do not really know either how they "reproduce" in VK world. Vampire reproduction, never thought I'd talk about it one day