Emperor Xian of Han
Cao Cao died on 15 March 220. His son and successor, Cao Pi, soon forced Emperor Xian to abdicate the throne in favour of himself, ending the Han dynasty. Cao Pi established a new state known as Cao Wei (sometimes known inaccurately as the Kingdom of Wei), and he granted Emperor Xian a noble title – Duke of Shanyang (山陽公). The former Emperor Xian died in 234 and was buried with honours befitting an emperor, using Han ceremonies, and the then emperor of Wei, Cao Rui, was one of the mourners. As Emperor Xian's crown prince was already dead, his grandson Liu Kang (劉康) inherited his dukedom, which lasted for 75 more years and two more dukes, Liu Jin (劉瑾) and Liu Qiu (劉秋), until the line was exterminated by invading Xiongnu tribes in about 309, during the Jin dynasty. This practice of an emperor conferring hereditary nobility on his predecessor, from whom he usurped the throne, was known as "er wang san ke" (二王三恪).
Empress Wu (Zhaolie)
Empress Wu (died September or October 245), personal name unknown, formally known as Empress Mu (literally "the Just Empress"), was an empress of the state of Shu Han during the Three Kingdoms period. She was the last wife and the only empress of Liu Bei, the founding emperor of Shu Han, and a younger sister of Wu Yi. Her father, whose name is not recorded in history, was a friend of Liu Yan, and followed Liu Yan to Yi Province (covering present-day Sichuan and Chongqing) when Liu Yan was made the governor. Because of the friendship between her father and Liu Yan, she was married to Liu Yan's son Liu Mao (劉瑁). After Liu Mao's death, she did not remarry for some time.