Family History

Family histories would play much different roles for different paranormals. If you have a paranormal who's based in genetics family histories would be very important. You would want to keep track of who had kids with who. You'd want to see which pairing resulted in kids. You'd want to see which kids developed powers.

In non genetic paranormal it would be less important. If I were a vampire I'd really want to know who was possibly related to me though because it would just be gross to be sleeping with your great great grandson or daughter.

If you are neither long lived or genetic paranormals family histories would be just like human family histories. A matter of interest that might tell you more about yourself but really wouldn't matter much in the long run. It's just nice to know.