There was no real rhyme to me naming the ones that are named so far. Chaos was off a whim..My girlfriend (now fiance) flipped because she wasn't expecting me to get him lol. I was talking to my mom about it that night and she said that the snake was causing chaos so hence his name. My son named all the others besides Ash. My younger sister saw him and said he needed lotion (axanthic gene) so his name became Ash lol.