And here are the nicknames from the Aztecs...

Itzli

Kimi- Cuetlachtli (meaning "Wolf")
Xoc- Ocelotl (meaning "Jaguar")
Yaotl- Ocuilin (meaning "Worm" or "Maggot") ((note: he only gave Yaotl a nickname after Yaotl left them...))
Chaos- Coyotl (meaning "Coyote")
Marsilu- Acahualli (meaning "Sunflower")

Mazatl

Shenandoah- Machtia (meaning "Teaching" or "to teach")
Ixazalouh- Papalotl (meaning "Butterfly")
Ueman- Ayotl (meaning "Turtle") ((it's a joke between the two...))
Loper- Tzahualli (meaning "Spider Web") ((referring to his fighting skills, in a way))
Mihil- Tochtli (meaning "Rabbit")

Mihil and Marsilu belong to Nova_Williams
Shenandoah, Kimi, Loper, and Chaos belong to faiththestoryteller