Cao Shuang
Cao Zhen had six sons: Cao Shuang, Cao Xi (曹羲), Cao Xun (曹訓), Cao Ze (曹則), Cao Yan (曹彥) and Cao Ai (曹皚). Among them, Cao Shuang inherited his father's peerage and marquisate as the Marquis of Shaoling (邵陵侯), while the other five also had their own marquis titles and marquisates. In 239, before Cao Rui died, he appointed Cao Shuang and Sima Yi as regents for his underage adopted son, Cao Fang, who succeeded him as the third emperor of Wei. In 249, Sima Yi staged a "coup d'état" against Cao Shuang and successfully seized power from him. After the "coup d'état", Cao Shuang and his brothers were convicted of treason and executed along with their entire families.