Kwon also written as Gwon is a Korean family name. Some sources list as many 56 clans, but most of them were merged with the Andong Gwon clan under the Sijeung-gong faction soon after the establishment of the Goryeo Kingdom.

Andong Kwon clan

The founder of Andong Kwon clan, Kim Haeng (金幸), was originally a royalty of the Silla Gyeongju Kim clan. He participated in the Battle of Gochang and helped Taejo, who established the Kingdom of Goryeo in 918; the new king bestowed upon Kim Haeng a new surname: Kwon (權), as he could judge the situation correctly and achieve a purpose flexibly (能炳幾達權).

Yecheon Kwon clan

The original surname of the Yecheon Kwon clan was Hŭn. However, they was forced to change their surname due to having the same character as the personal name of King Chungmok of Goryeo, which was Wang Hŭn. Due to the naming taboo of using the character of the king's personal name, the Hŭn family changed their surname to Kwon (權), which was the surname of the mother of the clan head. The head of the Hŭn clan at this time, Kwon Sŏm, became the founding ancestor of the Yecheon Kwon clan. Approximately two thirds of clan members live in the Gyeongsang provinces. All members of the Heun (昕) clan disappeared before the founding of Joseon. Another account states that the Yecheon Heun (昕) clan's Jeoksin, Suchang, Seungdan, and Seungjo married into the Andong Kwon clan and afterward their descendants took their mothers' surname Kwon (權). Yecheon Kwon clan called an Obongmun (五福門) in late Goryeo.

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