Yi Yung-jun

Yi Yung-jun (Korean: 이융준; Hanja: 李隆俊; 22 November 1858 – 25 May 1859) was an heir presumptive of Joseon (wonja, 원자, 元子) as the only son of Yi Byeon, King Cheoljong and Queen Cheorin. From birth, he became a Wonja, unlike his half-brothers. He died on 25 May 1859, at the age of six months, due to a fever. He was the last male descendant of King Hyojong and the last male bloodline of King Yeongjo. There is only a record that his mourning was held as a state funeral by order of King Cheoljong, and the location of his burial and whether he was given a posthumous title are unknown.