I don't find it trashy or tacky, just lacking in substance. It seems better as a middle name than a first name, but I still prefer names ending in -belle or beginning with Bel- over just
Belle.
I like both
Phoebe and
Emmeline, but
Phoebe Belle sounds very cutesy. I prefer
Phoebe Belinda,
Phoebe Isabelle, and
Phoebe Annabelle.
Emmeline Belle has a nice flow. I don't mind it.