Tristan da CunhaTris·tan da Cun·ha
group of four British islands in the South Atlantic, administered as a dependency of St. Helena: 38 sq mi (98 sq km)
Tristan da Cunha
An island and volcanic island group of the southern Atlantic Ocean between southern Africa and southern South America. Discovered by the Portuguese in 1506, the islands were annexed by Great Britain in 1816 and are now administered as a dependency of St. Helena.
After Portuguese explorer TristÃ£o da Cunha (1460-1540).