I'm not enamoured
(yet?) but I'm intrigued by this name. It's vintage, enchanting, a little bit quirky, reminds me of
Sylvia (and I love Sylvia); and there are too many spelling variants
(and I'm not sure it's a good thing).
Well, people seem to favour
Sybil, not an original
Sibyl. I also like
Sybilla and
Sybella.