Korean clans

Korean clans are groups of Korean people that share the same paternal ancestor. They are indicated by the combination of a bongwan (Korean: 본관; lit. place of origin) and a family name.

Korean clans distinguish clans that happen to share the same family name. The bongwan identifies descent groups by geographic place of origin. For example, the Gyeongju Kim and the Gimhae Kim are considered different clans, even though they happen to share the same family name Kim. In this case, Gyeongju and Gimhae are the respective bongwan of these clans. However, a clan name is not treated as a part of a Korean person's name. The bongwan and the family name are passed on from a father to his children, thus ensuring that person in the same paternal lineage sharing the same combination of the bongwan and the family name. A bongwan does not change by marriage or adoption.

Different family names sharing the same bongwan sometimes trace their origin to a common paternal ancestor, e.g. the Gimhae Kim clan and the Gimhae Heo clan share Suro of Geumgwan Gaya as their common paternal ancestor, though such cases are exceptional.

According to the population and housing census of 2000 conducted by Statistics Korea, there are a total of 286 surnames and 4,179 clans. The 2015 census reported that a total of 36,744 family clans exist among the 1,507 surnames extant in South Korea.