Second son of Grand Prince Wanpung, progenitor of the Yangdogong lineage
| Life | 1354 ~ 미상 |
| Era | 고려 말~조선 초 |
| Clan | 전주 이씨 |
Yi Cheon-u (李天祐, b. 1354) was the second son of Grand Prince Wanpung, Yi Won-gye. He is known as Yangdogong, and his descendants form the Yangdogong lineage, a sub-branch of the Wanpung Daegun branch of the Jeonju Yi.
His father, Grand Prince Wanpung, was the eldest son of Hwanjo and founder of the Wanpung Daegun branch.
According to the Yangdogong association, his descendants settled in Damyang and Yeonggwang and number about 100,000. The association's office is at 377 Tongil-ro, Seodaemun-gu, Seoul.
The Yangdogong association is a sub-branch of the Wanpung Daegun branch, made up of Yi Cheon-u's descendants. According to the association, about 100,000 descendants settled in Damyang and Yeonggwang. Its office is at 377 Tongil-ro, Seodaemun-gu.
The Yangdogong association gives the number of registered branch associations as 92, while the Onnyeong-gun association gives 89. Yi Cheon-u's death year was not confirmed.
The location of his grave was not confirmed in this research.
His descendants form the Yangdogong association. According to the association, they settled in Damyang and Yeonggwang and number about 100,000.