Cheongnam-wing official, Inspector-General and governor of Gaeseong; pen name Yaksan; posthumous title Chungjang

| Life | 1689 ~ 1745 |
| Era | 조선 후기 |
| Clan | 동복 오씨 |
O Gwang-un (1689-1745) was a late-Joseon official from Dongbok, courtesy name Yeongbaek, pen name Yaksan, posthumous title Chungjang. His great-great-grandfather was Minister of Rites O Jun, his father O Sang-sun, his wife of the Andong Gwon. He passed the civil examination in 1719 and served as director of rites, editor, deputy royal secretary, deputy governor of Hanseong, Vice-Minister of Punishments and Rites, Inspector-General and governor of Gaeseong.
Because of his role during the 1728 rebellion he was made Minister of Personnel and Director of the Academy posthumously, and received the title Chungjang in 1788. He belonged to the Cheongnam hard-line wing; it is notable that he reached Inspector-General when most Southerners were out of power under Yeongjo.
His son O Dae-gwan topped the 1732 special examination, and his collection Yaksan manggo survives, with images on Wikimedia Commons crediting O Gwang-un and O Byeong-seo. He is the eighteenth-century successor to O Jeong-wi and O Si-su.
Under Yeongjo the impartiality policy was pursued, but the 1728 Musin rebellion implicating Soron and Southerner figures sharply weakened the Southerners. That O Gwang-un nevertheless became Inspector-General and governor of Gaeseong suggests respect for his learning and conduct. The explanation that his service connected with the rebellion grounded his posthumous honors shows he was seen as having helped suppress it; the specifics were not confirmed here.
His great-great-grandfather was O Jun, his father O Sang-sun, and his son O Dae-gwan topped the 1732 special examination.
Sources: Wikipedia and Encyclopedia of Korean Culture-based material; genealogies may differ.
His tomb location was not confirmed here.