Thayawthadangyi Kyun (Elphinstone Island)[1] is an island in the Mergui Archipelago, Burma. It is irregular in shape, hilly and thickly wooded. Daung Kyun lies off its southeastern shore. Thayawthadangyi's area is 120 km².[2] The highest points, both rising on the western part of the island are 533 m high Elphinstone Peak and 430 m high False Peak.