Actually, to the person who mentioned Clarise, there is a French version of Clarice, spelled Clarisse :)
― Anonymous User 7/22/2013
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Clarice is a wonderful name, very pretty, but when I used it for a character I spelled it "Clarise" with an S instead. A few other people in the world spell it that way, though it's still uncommon, and I think it's prettier that way.