No, the Word 'tribe' is a common noun, a Word for any tribe of any kind, anywhere.
A proper noun is the name of a specific person, place, thing, or a title; for example:
- Little Tribe Street, South Melbourne, Australia orTribe Road No. 1, Paget, Bermuda
- Coquille Indian Tribe, Oregon or the ancient Taexali Tribe of northern Scotland
- Tribe Marketing (promotions), London, UK
- Tribe Hotel,Nairobi, Kenya
- "The Will of the Tribe", a novel by Arthur Upfield
