Onjo of Baekje
Onjo (?-28, r. 18 BC–AD 28) was the founding monarch of Baekje(백제,百濟), one of the Three Kingdoms of Korea. According to the Samguk Sagi(삼국사기,三國史記), he was the ancestor of all Baekje kings.
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Onjo of Baekje - Wikipedia