Sable Island

French sable (“sand”) +‎ island. From French Île de Sable (“Isle of Sand”). From being an island made up of a sandbar.

Sable Island

1. An island in Nova Scotia, Canada. A small island and sand bar of Canada in the Atlantic Ocean to the southeast of Halifax, Nova Scotia, and in its jurisdiction.
2. Ellipsis of Sable Island horse (a breed of feral horse found on the island).

The term has nothing to do with sables, the fur bearing animal, nor the colour, but instead to the French-language word for sand.