U T'ak

[1] U T'ak helped spread Neo-Confucianism, which had come from the Yuan dynasty, in Korea.

He was the 7th generation descendant of the Danyang Woo clan's founding ancestor, U Hyŏn.

U had two sons, U Wŏn-gwang (우원광; 禹元光) and U Wŏn-myŏng (우원명; 禹元明).

[5] U T'ak is considered as the ancestor of the Moonheegong branch (문희공파; 文僖公派) of the Danyang Woo clan.

[2][6] U T'ak was a respected scholar and centuries after his death, a Joseon Confucian scholar, Yi Hwang, helped to establish the Yeokdong Seowon [ko] in honor of U T'ak in 1570.