Tarquin

Reminds me of the word terrapin.

This name deserves to be puked on.

I really like this name. I would use it, except I wouldn't want the association of Tarquin the rapist of Lucretia. :s.

Considered to be quite a posh name in the UK and is often used as the butt of jokes about aristocracy.

Unique... should be useful.

Call me crazy, but I think that this name would not look too bad on a female. Okay, maybe not on a child in modern day society, but maybe on a character. I certainly believe that if you spelt it a tad differently (eg: Tarquine) it would most definitely appear rather effeminate (though it may unfortunately alter the pronunciation a bit).