Seo Yeongsuhap

Seo Yeongsuhap (; 1753–1823) was a Korean poet.

Biography Seo Yeongsuhap was born into a high-ranking family, the Dalseong Seo clan , as the daughter of the governor of Gangwon Province, Seo Hyeong-su, and Lady Kim of the Andong Kim clan. Through her mother, Lady Seo was a great-great-great-granddaughter of Princess Jeongmyeong and Hong Ju-won. Thus making her be fourth cousins to Lady Hyegyeong, and a fourth cousins once removed to her future husband. Through paternal grandfather, Yeongsuhap and the future Queen Sunwon, King Jeongjo’s daughter-in-law, were third cousins.

She was reportedly known for her abilities in mathematics.

She was later arranged to marry Hong In-mo of the Pungsan Hong clan, a royal official. They had three sons, Hong Seok-ju, Hong Gil-ju, and , and two daughters, Hong Won-ju (alternatively known as Hong Yuhandang) and Lady Hong. All four became poets as well, and Gil-ju under the influence of his mother also became a notable mathematician. Her third son, Hong Hyeon-ju, married Princess Sukseon, the only daughter of King Jeongjo of Joseon, who herself is known for inventing Kkakdugi, i.e. the diced radish kimchi.