Well my adoptive family (dad's side) is very Czechoslavakian. My last name actually means, "little rabbit" in Czech. They emigrated to the Nebraska area in the 1800s with many other Czechs.
My mom (adopted) side is all over the place. Irish, Cherokee Indian, you name it. They're mutts.
As for my biological family, we only know about my mother's side, which is VERY Italian (and I look it). The last name is one of those super-Italian ones, but I haven't found out what it is yet. We think my biological father was Irish, but that's only because he had red hair.