Here's what the Mayas called their closer sibling when they were young (or when their siblings were young)

Ixazalouh

Shenandoah- Kaab (meaning "Honey")
Ueman- Xux (meaning "Wasp")
Loper- Chan Koh (meaning "Little Mountain Lion")
Mihil- K'i'xooch (meaning "Porcupine")

Xoc

Kimi- Chinwol (meaning "Tarantula")
Yaotl- Tuunich (meaning "Stone")
Chaos- K'ulu (meaning "Raccoon")
Marsilu- Chan Mis (meaning "Little Cat")

Marsilu and Minil bong to Nova_Williams

Kimi, Shenandoah, Loper, and Chaos belong to faiththestoryteller