Kim Yo-jong
His second mistress, Ko Yong-hui, was a Japanese-born ethnic Korean and a dancer. She had taken over the role of First Lady until her deathreportedly of cancerin 2004. They had two sons, Kim Jong-chul (in 1981) and Kim Jong-un, also "Jong Woon" or "Jong Woong" (in 1983). They also had a daughter, Kim Yo-jong, who was about 23 years old in 2012.