Their Bon-gwan is in Haman County, South Gyeongsang Province.

According to the research held in 2015, the number of Haman Jo clan was 282890.

Their founder was Jo Jeong [ja] who was a chief vassal in Goryeo.

He was a descendant of a royal family in Zhao (state).

He was awarded Gongsin (Hanja: 功臣) and Four-star rank.