@ebrown p,
If my child didn't like his/her name - I'd let him/her change it. I changed my daughter's given name when I adopted her (at four months) and I've told her what her given name was and asked her if she felt more of a connection to that name or the name that we gave her. I always felt a little guilty about changing her name.
She's happy with her name as it is now legally, but if she preferred the first name she was given, I would readily agree. I think it's more important that the person who is bearing the name needs to feel connected to that name and its connotations moreso than the feelings of anyone else.
(I liked her original given name, but her father didn't- that's why we changed it. I like the name we gave her better than the original name - but I could definitely have lived with her original name).