Côn Sơn Island (Vietnamese Côn Sơn), also known as Côn Lôn (Khmer: Koh Tralach), is the largest island of the Côn Đảo archipelago, off the coast of southern Vietnam. The island is also known after its Malay name as Pulo Condore (pulo as a corruption of pulau, meaning "island"), while its French variant Poulo Condor was well known during the times of French Indochina. Marco Polo mentioned the island in the description of his 1292 voyage from China to India under the name Sondur and Condur. In Claudius Ptolemy's Geography they are referred to as the Isles of the Satyrs.