I think as a first name it's too over-the-top, like a lot of other Arthurian names seem to be.
Hypothetically I think it's alright. I have some combos for it like
Bedivere March and
Bedivere Blythe that keep it all medieval fun.
For real life I think it's best left as a middle name. For some reason I had
Christopher Bedivere pop into my head and I'm not sure what to think about it.