I decided to take some of my own advice - for a change - and googled the name Zabrack. Most of my results were my own posts to various boards. Most of the rest referred to a race of humanoids - the Zabrak - from the Star Wars series.
I think this totally proves that this family came here from outer space! Thanks to Wookieepedia, I've solved that mystery.
That's my story and I'm sticking to it!
Copyright 2010, ACK for Gene Notes