In modern Korea, roughly one in every five people (over 10 million individuals) carries the last name Kim (김 / 金). To Western and international observers, this often gives the impression that all Kims belong to a single enormous family.
In traditional Korean culture, however, your surname is only half of your ancestral identity. Your true biological descent is defined by your Bon-gwan (본관 / 本貫)—the specific ancestral city or geographical seat where your family line was originally founded over a millennium ago.
1. Nearly 300 Distinct Kim ClansA Gimhae Kim (descended from King Suro of ancient Gaya), a Gyeongju Kim (Silla royalty), and an Andong Kim share no common ancestor and represent completely separate family trees.
2. Over 1,000 Years of HistoryThe Andong Kim rose to become one of Korea's most influential aristocratic (Yangban) clans, producing prime ministers, royal queen consorts, military heroes, and moral philosophers.