Ayu and Pippa because they sound like a couple of my friend's names and nicknames.

Kiki because it was my nickname in one of my classes.

Kiri and Kon because they're the names of two characters in two different manga I read

Maki, Hakea, Jade, Joop, Kaki, Lakia, Agate, Bixa, Aponi just because.

Dodo, Ima because they're different and a little funny.