Clans
As with all Korean family names, the holders of the Han surname are divided into different patrilineal clans, or lineages, known in Korean as bon-gwan, based on their ancestral seat. Most such clans trace their lineage back to a specific founder. This system was at its height under the yangban aristocracy of the Joseon Dynasty, but it remains in use today. There are approximately 241 such clans claimed by South Koreans.
Read more about this topic: Han (Korean Name)