Tristan da Cunha is the main island of the Tristan da Cunha archipelago , which consists of the following islands : Inaccessible Island and the Nightingale Islands are 35 kilometres ( 21.7 mi ) SW by W and SSW of the main island respectively , whereas Gough Island is 395 kilometres ( 245.4 mi ) SSE .
Tristan da Cunha is the name of the archipelago and of the main island of the group ; the archipelago consists of the following islands : Inaccessible Island and the Nightingale Islands are located 35 km ( 21.7 mi ) southwest of the main island , while Gough Island is located 395 km ( 245.4 mi ) south-southeast .