 The Taewon Seonwoo clan and the Hangju Gi clan are believed to have originated from the same root as the Cheongju Han clan.According to the genealogical records the last King of Gojoseon, Gijun of Gojoseon is believed to have had three sons, U-Pyeong (우평), U-Seong (우성) and U-Ryang (우량).During Korea's Three Kingdoms period, U-Pyeong is said to have settled in Goguryeo, and his descendants later established the Taewon Seonwoo Clan, U-Seong is said to have settled in Baekje, and his descendants later established the Hangju Gi Clan and finally U-Ryang is said to have settled in Silla and his descendants later established the Cheongju Han Clan establishing its "bon-gwan" in Cheongju.