Onjo

18 B.C-28 A.D

Legendary founder of Paekche, reputedly the third son (some sources say the second) of King Tongmyong (Jumong) the legendary Koguryo founder. (Samguk Yusa).

According to the Samguk Sagi, King Onjo who led a group of people from Koguryo to the Han River region of Korea founded Paekche in 18 B.C.

According to the Chinese record San Guo Zhi, during the Samhan period, one of the chiefdoms of the Mahan confederacy in the Han River basin was called Paekche.

Onjo had a powerful physique and noble qualities worthy of a prince. He loved horseback riding and archery. (Samguk Yusa)

Biryu

Biryu was the second son of Jumong and So seo-no, and older brother of Onjo. In an alternate legend, Biryu himself is described as the founder of Paekche.

Samguk Sagi presents two founding legends of Paekche, one crediting Onjo, and an alternate crediting Biryu. The Samguk Sagi relays only Onjo's descendents, not Biryu's, as the royal dynasty of Paekche. However, Biryu's descendents are thought to have maintained enough influence in Paekche for this legend to survive.

According to the main account given in the Samguk Sagi, Biryu settled in Michuhol. Onjo settled in Wiryeseong. When the Michuhol land proves to be inhosbitable, Biryu and his people went to Onjo, demanding that he be the King of Shipje. After Onjo refused, Biryu declared war but lost. In shame Biryu committed suicide. Later, the two groups merged to become Paekche.

Note:

Wiryeseong is present day Hanam.

Michuhol is present day Incheon.

Onjo first called his country Shipje (meaning Ten Vassals). After Biryu committed suicide his people moved to Wiryeseong and Onjo welcomed them and renamed his country Paekche (meaning Hundred Vassals).