Queen Kyŏngsun of the Munju Pak clan () was the first wife of Yi Ch'un and mother of Yi Jachun who would become Joseon's founder, Yi Seonggye's father. She was posthumously honoured as Queen Kyŏng () at first.
Biography Lady Pak was born in 1268 as the daughter of a Yuan dynasty's Cheonho (), Pak Kwang, Internal Prince Anbyeon () who was a son of Pak T'ong (). She later married Yi Ch'un with the couple having 5 sons and 2 daughters. After her death, instead of remarrying, her husband took Lady Cho (), the daughter of Cho Yanggi (), as a concubine.
On July 28, 1392, her grandson, Yi Sŏnggye established the new dynasty, the Joseon Dynasty. As the grandmother of the king, Lady Pak was given royal title of Kyŏngbi () and later on April 22, 1411, her great-grandson, Taejong of Joseon, gave her a posthumous name Queen Kyŏngsun (). Her tomb was located in Sulleung, Heungnam-si, South Hamgyeong Province.
Family Father - Pak Kwang (; 1240–?) Husband - Yi Ch'un, Tojo of Joseon (; 1265–1342) Issue Daughter - Princess Munhye (; 1283–?) Daughter - Princess Munsuk (; 1285–?) Son - Yi Chahŭng, Grand Prince Wanch'ang (; 1287–?) Son - Yi Py'ŏng, Grand Prince Wancheon (; 1311-?) Son - Yi Chach'un, Hwanjo of Joseon (; 1313 – 3 May 1360) Son - Yi Chasŏn, Grand Prince Wanwon (; 1317–1356) Son - Yi Chong, Grand Prince Wanseong (; 1320–1385)
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