My past bettas were pretty much all named from the game World of Warcraft : Leroy (referencing Lerrroooooy Jennnnkiiins!), Khadgar, Chen, Wrynn, and Carlin. I also had a small sorority where most of the ladies were named referencing World of Warcraft: Sylvie (short for Sylvanaas) Lex (short for Alexstraaza), Rhea, Lemon and Queenie.
Currently I have only one betta boy, my pretty boy Stan. Why? Well, just because. :)