The name Mirabelle is a girl's name of French origin meaning "marvelous". Mirabelle and is often added to lists like Girly Girl Baby Names and discussed in our forums with posts like "Girls Drop 2 Add 1 pick a fave that can't be dropped".
From the experts:
If you're looking for a fresher belle name than Isabelle, Mirabelle is lovely, and we also like the extra flourish of Mirabella. And if you want a nature tie, Mirabelle is also the name of a delicate French plum.
Steve Martin chose the name for the heroine of his novel Shopgirl--Mirabelle Buttersfield..
Another pretty possibility: Maribel.