Chung Nanjung

Jeong Nan-jeong was a Korean de facto politician of the Joseon period. She was the influential concubine of Yun Won-hyeong, who himself was the maternal uncle of 13th King Myeongjong, and Chief State Councilor 인 in 1563–1565. She reportedly had Yun Won-hyeong's first wife poisoned to death and became the 2nd wife with full status. She was close to her sister-in-law Queen Munjeong. In 1565, after the death of the Queen, both Jeong and Yun were exiled from the capital and, unable to make a political comeback, both committed suicide by poison