I've convinced my girlfriend to name her new kitten "OS X." Sure, she insists on calling it "oslo" (OS X is pronounced o·s·ten, which, when written out in numerical form, kind of looks like "oslo"), but it's still a small victory as far as I'm concerned.
My favorite quip from one of the e-mail "debates" we had regarding the name: "Still, I don't want my kitty to be obsolete in a few years." Haha. I told her that OS X is just getting started (see the iPhone).