Hae Mo-su of Buyeo
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Hae Mo-su was the founder of Buyeo. According to the Samguk Sagi, Hae Mo-su was the father of Goguryeo's founder, Jumong. According to the Samguk Yusa, Hae Mo-su was the son of heaven, riding in a chariot of five dragons, to establish Bukbuyeo. Wikipedia
Full name: Hae Mo-su
Great grandchildren: Daemusin of Goguryeo, Hae-myeong, Minjung of Goguryeo, and more
Partner: Lady Yuhwa
Children: Chumo of Goguryeo
Grandchildren: Onjo, Biryu, and Yuri of Goguryeo