I think you should leave the name as is, as long as you DS is content and happy socially. Why should he change because of this society?!? I understand where you are coming from though. I think you're belief that he can control this and change if HE wants too is great. It's showing him resiliance, yet also independence to make important decisions. It could be worse, you could've named him D'Weazel or D'Rascal! (Twin boys I taught!) hehe.
I think when he gets older Ally (a name I also like for a boy) might become a name that identifies him strongly from the rest of his cohort