I think Roseberry would get confused a lot with
Rosemary. It also reminds me of a name of a Briarberry Bear (toy line) that
Anna used to play with. All of the bears had berry in their names (
Berry Ellen, etc.).
Anna had three with names similar to hers and her sisters (
Berry Ann,
Berry Kate, forgot the third one). There may have been a
Berry Rose or
Rose Berry as well.
Re: the name itself, it sounds very sweet but my first thought is that is SHOULD be
Rosemary! Or maybe it's
Rosemary with a head cold.