Jeju was an independent country called Tamna (耽羅) until it became a protectorate of Silla in 662. In 938, after the fall of Silla, Tamna became a protectorate of Goryeo. In 1105 Tamna lost its autonomy and became a province of Goryeo. It was King Euijong of Goryeo who changed the island's name from Tamna to Jeju.