[2] There were some Korean clans that had an actual progenitor of Chinese origin, but many others made ancestral connections to China without any historical basis; most Korean clans that claim descent from Jizi, the Han dynasty, or immigrants from China during the Three Kingdoms or Later Silla periods are not supported by historical records and were founded mostly by Goryeo people.
[5] In South Korea, there are a total of 286 Korean family names, roughly half of which are of foreign origin (mostly Chinese), and 4,179 clans (bon-gwan).
[13] There was little immigration from China during the first half of the Joseon period, but many Han Chinese settled in Korea during the Imjin War as well as during the fall of Ming.
Naturalized Jurchens of the Goryeo period reported on the state of the North, constructed fortresses, and some attained high government positions through military achievements, such as Go Yeol.
[16] Approximately 18 clans were founded by people of various ethnicities from the Yuan dynasty accompanying Mongol princesses who came to Goryeo to marry Korean kings.
[18] Records from the History of Goryeo and the Annals of the Joseon Dynasty reveal that Japanese immigrants became naturalized in 999, 1012, 1039, 1425, 1426, and 1435; they were bestowed Korean clans, but most of them have been lost.