the Jeju Island-- Korea

 Jeju Province (officially the Jeju Special Autonomous Province^[1]) is one of the nine provinces of South Korea. The province is situated on andcoterminous with the nation's largest island of Jeju (also Jejudo; see Naming below), formerly transliterated as Cheju, Cheju Do, etc., or known as Quelpart to Europeans. The island lies in the Korea Strait, southwest of South Jeolla Province, of which it was a part before it became a separate province in 1946. Its capital is Jeju City

. According to legend, three demi-gods emerged from Samsung-hyeol which is said to have been on the northern slopes of Mt. Halla and became the progenitors of the Jeju people who founded the Kingdom of Tamna.

It has also been claimed that three brothers—including Ko-hu—who were the 15th descendants of Koulla, one of the Progenitors of the Jeju people, were received by the court of Silla, at which time [when?] the name Tamna was officially recognized, while the official government posts of Commander, Prince and Governor were conferred by the court upon the three. However, there is no concrete evidence of when the "Three Names" (Samseong-Ko, Yang and Pu) appeared nor for the exact date of when Ko-hu and his brothers were received by Silla. It may be supposed that the "Three Names" Founding Period occurred during the Three Kingdoms (Goguryeo, Baekje and Silla) Period on the mainland of Korea.

 Taejo, founder of Goryeo, attempted to establish the same relationship between Goryeo and Tamna as Tamna had had with Silla. Tamna refused to accept this position and the Goryeo court dispatched troops to force Tamna to submit. Ko ja-gyeon, chief of Tamna, submitted to Goryeo in 938 and sent his son, Prince Mallo, to Goryeo's court as a de facto hostage. In 1105 (King Sukjong's 10th year), the Goryeo court abolished the name Takna which had been used up to this time and, from that year on, the island was known as "Tamna-gun" (district) and Goryeo officials were sent to handle the affairs of the island.

Tamna-country was changed to Tamna-county in 1153 during the reign of King Uijong and Choi Cheok-kyeong was posted as Tamna-Myeong or Chief of Tamna. In 1121 during Huijong's reign, Tamna was renamed "Jeju" and the posts of Judiciary were established on the island.

In 1271, General Kim Tong-jeong escaped with what remained of his Sambyeolcho force from Jindo and built the Hangpadu Fortress at Kwiil-chon from where they continued their fight against the combined Korean government-Mongolian army but within 2 years, faced by an enemy army of over 10,000 troops, the Sambyeolcho was annihilated