They just dug it and didn't know anyone named Emma. I have at times whined at them about it and they have said "oh obviously it's because we hate you right" and then "well it's a great name everyone has good taste" and ignored me.
I really don't think it's that bad either, and before it shot into popularity I wasn't really aware of the little-girl delicate image everyone had of it. I like E a lot and I like the two M's and I like how random it is. But jeez I'm completely not an Emma at all.