Jo Gwang-jo
Kim Anro executed in 1537. After that, Yun Im and the Queen's brothers, Yun Won-ro and Yun Won-hyeong filled the power vacuum. Many officials gathered around the two centers of power and developed into separate political factions. Yun Im's faction became known as ‘Greater Yun’ and the Yun brothers' faction as ‘Lesser Yun.’ Many Sarim scholars joined the Greater Yun since they had great hopes for the Crown Prince, who studied under Jo Gwang-jo and Yi Hwang.