| Princess Jeongsin | |
| Succession: | Princess of Goryeo |
| Reign: | 1390–1392 |
| Coronation: | 1390 |
| Predecessor: | Princess Suknyeong[1] |
| Successor: | Princess Gyeonghwa[2] |
| Regent: | Wang Yo, King Gongyang |
| Reg-Type: | Monarch |
| Father: | Gongyang of Goryeo |
| Mother: | Royal Consort Sun of the Gyoha No clan |
| Issue: | Lady Woo |
| Birth Date: | 1366 |
| Birth Place: | Goryeo |
| Death Date: | 1421 (aged 55) |
| Death Place: | Joseon |
| House: | House of Wang (by birth) Danyang Woo clan (by marriage) |
| Religion: | Buddhism |
Princess Jeongsin (; 1366 — 1421) was a Goryeo Royal Princess as the second daughter of King Gongyang and Royal Consort Sun.[3] [4]
On 17 April 1390, she was honoured as Princess Jeongsin along with her sisters,[5] then married with Woo Seong-beom whom later honoured as Prince Danyang .[6] [7] However, in July 1392, after Yi Seong-Gye's ascension to the throne and made the new dynasty, Woo was sentenced to death and was beheaded along with Gang Hoe-gye, her younger brother-in-law.
Woo Seong-beom came from the Danyang Woo clan who was the eldest son of Woo Hong-su [8] and the grandson of Woo Hyeon-bo . With Woo, she had one issue, a daughter.[9] While the Princess's father-in-law tried to conspired, it was failed and died after being executed by Taejo's royal troops in 23 August.