Four more from the Buffyverse:
Pylea - Home planet of the green guy from Angel
Aud D'Hoffryn - Aud was Anya's original name, D'Hoffryn her demon boss
Xander Summers - Portmanteau of Xander Harris and Buffy/Dawn Summers
There's also a guy called Grue Slugger or something - an apparent reference to Groosalugg, also from Pylea, who fell in love with Cordelia in Angel