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.
History of the Workers' Party of Korea
In 1980, the WPK Congress elevated Kim Jong-il to senior positions and publicized his status as heir apparent. Until then, it seemed likely that Kim's successor would be either Oh Jin-wu or Prime Minister Kim Il (not related to Kim Il-sung). In fact, it seems that Kim Il-sung had always planned that his son would succeed him, and had been advancing him within the Army (the real source of power in the DPRK) since 1974. Kim Il was removed from office in 1976 and died in 1984, and Oh remained loyal to the Kim family. Well before Kim Il-sung's death in 1994, Kim Jong-il had become the day-to-day ruler of the country, and had promoted his own followers to key positions in the Army. Kim Jong-il's accession was followed by a round of purges in the WPK, in which some of his father's old followers were removed from office.