Thanks for such a well-written response. I was worried it may be mistaken for a kr8ive or made up name. And good point about middle names.
I can't use it in Hungary because it isn't on the approved list of names (yet, anyway). Even if it was, the pronunciation would be butchered. X also isn't a letter in the Hungarian alphabet (though it's recognized as a foreign letter)- which doesn't stop
Alexandra from being a very popular name, but then again that's an extremely well-known name, unlike
Xanthippe. So it'd be very difficult to have, much more so than in the US or Britain.