I could say the same to you. [He's never heard a name like Kirei Kotomine before. It's... Unusual, to say the least. Not that he really cares or anything, he rarely ever does these days.]

Sariel is hardly that interesting of a name. [He takes pride in his name, but...

That aside though...;] Quite a few, I believe. Though I haven't concerned myself with an exact number.