Of Balto and Jenna's brown-and-white and red-and-white pups, three names are known for sure: Kodi, Dingo, and Saba. The two unnamed pups, the subjects of many "Balto" fan-fictions, have had names such as Kiona, Taktovik, Wolfe, Stadka, Anchorage, and Tydye.
Muru's name is Latin. It could come from "mus", meaning 'mouse.' Or, more probably, it derives from "murus", which means 'wall.' This is where we get the word 'mural.' Most likely, it comes from "murus" because Muru himself turns out to be a cave painting, and he is part of a huge mural on the cave wall.