[1] He was the grandson of Beolhyu Isageum, and a member of the Seok clan.
He was the son of Goljeong with Lady Ongmo, a daughter of Kim Gudo.
Lady Ongmo's brother was Michu Isageum.
The Samguk sagi also reports that the small country of Gammun-guk (near present-day Gimcheon) was conquered by Jobun's general Uro in 231.
Clashes with Goguryeo and Wa took place during Jobun's reign.