Kim Jong-suk
Kim Jong-suk married Kim Il Sung in the Soviet Union, most likely in 1941. On February 16, 1941 (or 1942, sources vary), in the Soviet village of Vyatskoye, Kim Jong-suk gave birth to Kim Jong-il, who was given the Russian name "Yuri Irsenovich Kim," and the nickname "Yura." In 1944, Kim Jong-suk gave birth to a second son, Kim Man-il in Korean and "Alexander" or "Shura" in Russian. In 1946, she gave birth to daughter, Kim Kyŏng-hŭi. Augustina Vardugina, a woman from Vyatskoye, was in her teens when Kim Il-sung’s guerrilla group camped there. She remembers Kim Jong-suk, and how she would come to the village to barter military rations for chicken and eggs. Her son, Kim Jong-il, would be holding her hand.
Kim Pyong-il
Kim was born to Kim Il-sung and Kim Song-ae, Kim Il-sung's former secretary. Kim had one younger brother, Yong-il, and one older half-sister, Kyong-hui, who would go on to marry senior official Chang Sung-taek. He was named after another son with the same name, who was born in Vyatskoye in 1944; that son, also known as Shura Kim, allegedly drowned in Pyongyang in 1947. He graduated from Kim Il-sung University with a major in economics, and later attended the Kim Il-sung National War College, following which he was appointed a battalion commander.