Yi Dang

Yi Dang (, February 1, 1783 – May 8, 1826) was a member of the Korean Joseon Dynasty. Despite his royal lineage he didn't receive a title during his lifetime, as his older brother was Crown Prince Sanggye and his mother, Princess Consort Sangsan of the Jincheon Song clan, his father, Prince Euneon, and his sister-in-law, Princess Consort Shin of Pyeongsan Shin clan, were charged and executed for treason during the Catholic Persecution of 1801.

His half-brother was Grand Internal Prince Jeongye, father of Cheoljong of Joseon. Provided by Wikipedia