The childhood name Kwinong, meaning back to farming, was assigned to Jeong Yak-yong in 1762 as a reminder of his family's withdrawal from official life following the execution of Crown Prince Sado. Born in Gwangju within the Joseon kingdom, he would eventually emerge as a polymath whose work spanning philosophy, engineering, and poetry defined the later Joseon period.
Early Education and Influences
The family lineage of Jeong was deeply rooted in the Southerners faction, a group that faced significant political exclusion for decades. His father provided rigorous intellectual training at their home in Mahyeon-ri. Tasan, as he was also known, displayed early intellectual aptitude, demonstrating keen observational skills by age six and composing poetry by age nine. He was heavily influenced by the scholarly heritage of Udam Chŏng Sihan and the revivalist studies of the Six Classics championed by his maternal ancestors.
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In 1783, Jeong passed the literary licentiate examination and entered the Sungkyunkwan. His trajectory shifted significantly in 1784 when King Jeongjo expressed admiration for his objective responses to royal inquiries. Following his success in the 1789 higher civil service examination, Jeong joined the Office of Royal Decrees. This rapid rise within the court drew hostility from the Old Doctrine faction, who grew suspicious of the Southerners' interest in foreign religious and intellectual trends.
Catholicism and Exile
Jeong and his brother Yakchŏn were baptized as Catholics in 1784, with Jeong taking the name John. His family maintained deep ties to the nascent Korean Catholic community; his brother Yakchong became a prominent leader of the faith. Following the sudden death of King Jeongjo in 1801, a political purge targeted members of the Southerners faction and Catholics. Jeong was subsequently sent into exile in Gangjin County, where he remained for 18 years until 1818.
Fast facts
- Born: 1762, Gwangju
- Died: 1836
- Art name: Tasan
- Christian name: John
- Citizenship: Joseon
- Exile period: 1801–1818
- Primary occupations: writer, poet, engineer, politician, philosopher
Questions readers ask
Was Jeong Yak-yong a Catholic?
Yes, he was baptized in 1784 and adopted the Christian name John, though his family's involvement in the religion contributed to his later political exile.
Why was he sent into exile?
He was exiled in 1801 due to his membership in the Southerners political faction and his family's association with Catholicism following the death of King Jeongjo.

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