I prefer it to
Christine, mostly because I don't usually like -ine or -een namesm with the exception of
Justine for some reason. But I'd never use it, not being even slightly
Christian myself.
Both my maternal great-grandmothers were named
Christiana. Apparently people where they lived were likely to have read "A Pilgrim's Progress" and used it as a name source, the main characters being
Christian and
Christiana! If only they'd been named something else,
Alice or
Emily or
Mary or something, I'd gladly have used it to honour the old darlings, but
Christiana is a bridge too far.