Liu Yuan
Later in 319, Liu Yao created Princess Yang—the former Jin empress—empress, making her the only person in Chinese history to serve as empress for two emperors and two empires. He created her son Liu Xi crown prince. He also changed the name of the state from Han to Zhao. (Liu Yuan had declared the empire's name Han to create a linkage with Han Dynasty—to which he claimed he was a descendant, through a princess, but Liu Yao felt that it was time to end the linkage with Han and explicitly restore the linkage to the great Xiongnu "chanyu" Maodun, and therefore decided to change the name of the state. However, this was not a break from Liu Yuan, as he continued to honor Liu Yuan and Liu Cong posthumously.)