Hi Op, I'm not a fan of both names together , the flow is peculiar . However I love the name Beau and it is the given name of my youngest girl. People always harp on about it being the masculine spelling in french for a boy . I was well aware of this when i chose it, i studied french in uni but language is fluid and ever changing and I like the sound and the spelling . My feisty Beau who at five yrs old loves martial arts could never be a dainty Belle . She owns her name. Her second name is Alexandra but we don’t use that day to day. Some girls suit masculine names Stevie Nicks , Daryl Hannah , Glen Close to name a few . ❤️