I don't name my bettas actually (Sad I know) but the only fish I've named is one of my fat female cories (Kirby). Kirby is the name of my vacuum cleaner (Brand)
Dont feel bad Kossy! I dont name mine either! (bad mommy!) I love my girls, but I just call them by their colors. (right now its "White girl", "Blue girl" and "Purple girl"). Im weird. (BTW: I also named a cory! "No Mouth") (cause he has no mouth...it got eaten by a crayfish...but hes ok and its almost grown back...he has "whiskers" again...)
anyway, I think I picked "Sneak" for my fave name. I dunno. I can never come up with good names for my fish! Im so picky! B)