Seong Hon
Seong Hon (25 June 1535 – 6 June 1598) was a Korean philosopher, poet, and politician during the Joseon Dynasty. He was a Neo-Confucianist scholar who was a close friend of the scholar Yi I (Yulgok) and an older contemporary of Yi Hwang (Toegye), leader of the country's "western faction" (seoin 서인, 西人) of the period.Seong Hon is often referred to by his stylized name of Ugye ("bull valley") and Mugam ("black stone"). He gained eminence not only as a scholar but as a revered politician and reformer, attaining the position of Fourth State Councillor/Vice Prime Minister (Jwachanseong 左贊成) in the Joseon State Council (uijeongbu). Seong Hon came from the Changnyeong Seong clan (창녕 성씨, 昌寧 成氏).
Seong Hon (25 June 1535 – 6 June 1598) was a Korean philosopher, poet, and politician during the Joseon Dynasty. He was a Neo-Confucianist scholar who was a close friend of the scholar Yi I (Yulgok) and an older contemporary of Yi Hwang (Toegye), leader of the country's "western faction" (seoin 서인, 西人) of the period.Seong Hon is often referred to by his stylized name of Ugye ("bull valley") and Mugam ("black stone"). He gained eminence not only as a scholar but as a revered politician and reformer, attaining the position of Fourth State Councillor/Vice Prime Minister (Jwachanseong 左贊成) in the Joseon State Council (uijeongbu). Seong Hon came from the Changnyeong Seong clan (창녕 성씨, 昌寧 成氏).

Selected works
"Ugye jip" (우계집, 牛溪集) (Works of Ugye)
"Jumun jigyeol" (주문지결, 朱門旨訣)
"Wihak jibang" (위학지방, 爲學之方)

Family
He was the great-grandfather of Yun Jeung through the marriage of his daughter, Lady Seong. She married Yun Hwang and produced a son, Yun Seon-geo, who eventually became the parents of Yun Jeung.

Great-Grandfather
Seong Chung-dal (성충달, 成忠達)
Grandfather
Seong Se-sun (성세순, 成世純)
Grandmother
Lady Kim (김씨, 金氏); daughter of Kim Geuk-ni (김극니, 金克怩)
Father
Seong Su-chim (성수침, 成守琛) (6 March 1493 - 7 February 1564); he and his brother became the students of Jo Gwang-jo
Uncle - Seong Su-jong (성수종, 成守琮)
Mother
Lady Yun of the Papyeong Yun clan (파평 윤씨, 坡平 尹氏)
Grandfather - Yun Sa-won (윤사원, 尹士元); nephew of Queen Jeonghyeon
Sibling(s)
Younger sister - Lady Seong of the Changnyeong Seong clan (창녕 성씨)
Brother-in-law - Min Sa-do (민사도, 閔思道)
Spouse - Lady Shin of the Goryeong Shin clan (고령 신씨, 高靈 申氏)
Father-in-law - Shin Yeo-ryang (신여량, 申汝樑)
Issue
Son - Seong Mun-yeong (성문영, 成文泳)
Son - Seong Mun-jun (성문준, 成文濬) (1559 - 1623)
Grandson - Seong Yeok (성역, 成櫟)
Granddaughter - Lady Seong of the Changnyeong Seong clan (창녕 성씨)
Grandson-in-law - Shin Min-il (신민일, 申敏一)
Grandson - Seong Ik (성익, 成杙)
Granddaughter - Lady Seong of the Changnyeong Seong clan (창녕 성씨) (1591 - 1627)
Grandson-in-law - Ahn Hu-ji (안후지, 安厚之) (1590 - 1664); eldest son of Ahn Bang-jun
Great-Granddaughter - Lady Ahn of the Juksan Ahn clan (죽산 안씨, 竹山 安氏) (1611 - 1678)
Great-Grandson - Ahn Jeon (안전, 安峑) (1614 - 1686)
Great-Granddaughter - Lady Ahn of the Juksan Ahn clan (죽산 안씨, 竹山 安氏)
Great-Grandson - Ahn Eum (안음, 安崟) (1622 - 1685)
Great-Granddaughter - Lady Ahn of the Juksan Ahn clan (죽산 안씨, 竹山 安氏)
Great-Grandson - Ahn Hoe (안회, 安𡼾) (1627 - 1668)
Grandson - Seong Jik (성직, 成㮨)
Granddaughter - Lady Seong of the Changnyeong Seong clan (창녕 성씨)
Grandson-in-law - Yun Jeong-deuk (윤정득, 尹正得)
Daughter - Lady Seong of the Changnyeong Seong clan (창녕 성씨)
Son-in-law - Nam Gung-myeong (남궁명, 南宮蓂)
Unnamed granddaughter
Unnamed granddaughter
Unnamed grandson
Unnamed grandson
Unnamed granddaughter
Unnamed grandson
Unnamed son
Unnamed son
Unnamed son
Daughter - Lady Seong of the Changnyeong Seong clan (창녕 성씨)
Son-in-law - Yun Hwang (윤황, 尹煌) (1572 - 1639)
Grandson - Yun Hun-geo (윤훈거, 尹勛擧)
Grandson - Yun Sun-geo (윤순거, 尹舜擧) (1596 - 1668)
Grandson - Yun Sang-geo (윤상거, 尹商擧)
Grandson - Yun Mun-geo (윤문거, 尹文擧) (1606 - 1672)
Grandson - Yun Seon-geo (윤선거, 尹宣擧) (1610 - 21 April 1669)
Great-Grandson - Yun Jeung (윤증, 尹拯) (1629 - 30 January 1714)
Grandson - Yun Min-geo (윤민거, 尹民擧)
Grandson - Yun Gyeong-geo (윤경거, 尹耕擧)
Grandson - Yun Si-geo (윤시거, 尹時擧)
Granddaughter - Lady Yun (윤씨)

See also
Korean Confucianism
Neo Confucianism
Yi I
Yi Hwang
Jeong gu
Cho sik

References
External links
Seong Hon:naver (in Korean)
Seong Hon (in Korean)
seong hon (in Korean)
Korean philosophy: Information from Answers (in Korean)
The Study on Moral Philosophy the Theory of Body and Mind Training of Gubong Song Ik-pil (in Korean)
Ugye Sung Hon`s viewpoint on the "Four-Seven" theory and the Eclectic School of the later Chosun (in Korean)