Left Chancellor under King Gongmin of Goryeo; Prince Haseong; founder of the Yangpyeonggong branch
| Era | 고려 말 |
| Clan | 창녕 조씨 |
Jo Ik-cheong (曺益淸) was a late-Goryeo figure and the founder of the Yangpyeonggong branch (襄平公派) of the Changnyeong Cho clan. He served as Left Chancellor under King Gongmin, was enfeoffed as Prince Haseong, and received the posthumous title Yangpyeong (襄平).
His descendants form the Yangpyeonggong branch, named after his posthumous title. The clan association reportedly estimates that about 65% of all members descend from him. This makes his line the largest within a clan that Wikipedia divides into about 48 branches.
His grandson Jo Sang-chi (曺尙治) served as Associate Director of the Jiphyeonjeon under King Danjong and founded the Bujehakgong branch. His exact dates and the location of his grave have not been confirmed.
The Yangpyeonggong branch, named after Jo Ik-cheong's posthumous title, is the largest line within the Changnyeong Cho clan. The clan association reportedly estimates that about 65% of all members descend from him.
His grandson Jo Sang-chi founded the Bujehakgong branch, so a further branch split off from within Jo Ik-cheong's line.
The Korean Wikipedia article on the clan introduces Jo Ik-cheong as a Yeonjeo suhaeng meritorious subject under King Gongmin of Goryeo who rose to Left Chancellor and Prince Haseong. His dates and grave have not been confirmed. Another late-Goryeo member of the clan, Jo Min-su, was left army commander at the Wihwado retreat; the two are remembered with princely titles (Haseong and Changseong). A direct genealogical link between them has not been confirmed.
The location of his grave has not been confirmed.
The Yangpyeonggong branch, which the clan association estimates at about 65% of all Changnyeong Cho members. His grandson Jo Sang-chi founded the Bujehakgong branch.