Jeong In-ji

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Jeong In-ji 정인지
Portrait of Jeong In-ji, ca. 1472
Chief State Councillor
In office July 25, 1455 – January 11, 1459
Preceded by	Yi Yu, Grand Prince Suyang
Succeeded by	Jeong Chang-son
Left State Councillor
In office November 11, 1453 – April 20, 1455
Preceded by	Kim Jong-seo
Succeeded by	Han Hwak
Personal details
Born	(1396-12-28)December 28, 1396 Hanseong-bu, Joseon
Died	November 26, 1478(1478-11-26) (aged 81) Hanseong-bu, Joseon
Korean name
Hangul	정인지
Hanja	鄭麟趾
Revised Romanization	Jeong Inji
McCune–Reischauer	Chŏng Inji
Art name
Hangul	학역재
Hanja	學易齋
Revised Romanization	Hagyeokjae
McCune–Reischauer	Hagyŏkchae
Courtesy name
Hangul	백저
Hanja	伯雎
Revised Romanization	Baekjeo
McCune–Reischauer	Baekchŏ
Posthumous name
Hangul	문성
Hanja	文成
Revised Romanization	Munseong
McCune–Reischauer	Munsŏng
Joseon Royal Title
Hangul	하동부원군
Hanja	河東府院君
Revised Romanization	Hadong Buwongun
McCune–Reischauer	Hadong Puwongun

Jeong In-ji (Korean: 정인지; Hanja: 鄭麟趾; December 28, 1396 – November 26, 1478) was a Korean Neo-Confucian scholar, historian who served as Vice Minister of Education or Deputy Chief Scholar (Head of Office for Special Advisors) during the reign of King Sejong the Great, Minister of Rites during the reign of King Munjong and Danjong, Left or Second State Councillor from 1453 to 1455 during the reign of King Danjong, and Chief State Councillor from 1455 to 1458 during the reign of King Sejo. He was nicknamed Hakyeokjae (학역재). He was from the Hadong Jeong clan (하동 정씨; 河東 鄭氏)

He is perhaps best known for having written the postscript of the Hunmin Jeongeum Haerye, the commentary on and explanation of the native alphabet Hangeul invented by King Sejong in 1443. He also contributed to the Goryeo-sa, the official history of the Goryeo dynasty, and the Yongbi Eocheon-ga (용비어천가).

His second son, Jeong Hyeon-jo, was married to Princess Uisuk, the second daughter of King Sejo of Joseon. His descendants would eventually have royal connections through their marriages.