Yeah, our last name is kind of long and ethnic, too (I think there are like 6 of us in the US)... This next baby's name is shaping up to be long, too. I remember when I was a kid, I couldn't get my own library card until I could write my whole name, so now I joke that our kids won't get theirs until they're in their mid-20s.
I can totally understand not using a name you'd planned to use for a foster baby. That name is already attached, you already have associations with it.