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,[1] father of Cheoljong of Joseon.
Yi Dang's birth father, Yi In, Prince Euneon, was an illegitimate son of Crown Prince Sado and Royal Noble Consort Suk of the Buan Im clan, a daughter of Im Ji-beon.
Prince Eunjeon's mother was Royal Noble Consort Gyeong of the Park clan.
A long time after his death, he was honored as Prince Punggye (풍계군; 豐溪君).