tribelet

noun2

1. •
   A small tribe of Native Americans, especially a small independent group of Native California people who shared a language and usually comprised one principal village, or several in close proximity, plus smaller resource-gathering camps and territories.

   • Kroeber’s emphasis on the small scale of indigenous California social organizations led him to attach the diminutive "-let" to the anthropologically normative term "tribe". — 1994
2. •
   A small tribal society in another part of the world.