Among the many mysteries surrounding North Korea’s leader Kim Jong-un, one stands out: the life—and ‘forbidden’ origins—of his mother, Ko Yong-hui. For 15 years in power, Kim Jong-un has never publicly named her—a silence rooted in politically sensitive circumstances. As reported by the BBC, Kim Jong-il was already married when he began an extramarital relationship with Ko Yong-hui. Under unclear conditions, she later became North Korea’s de facto first lady.
A Mythic Lineage
The legitimacy of the Kim dynasty rests heavily on its claimed descent from Mount Paektu—a symbolic origin tied to Kim Il-sung, the founding father of North Korea and a near-mythical figure in state propaganda. In a country that prides itself on dynastic purity, Ko Yong-hui’s identity is not merely a secret; according to the BBC, it poses a potential threat to the regime’s foundational narrative.
Mount Paektu, straddling the China–North Korea border, is revered as the legendary birthplace of Dangun—the mythical founder of Korea’s first kingdom. Centuries later, Kim Il-sung reportedly used the mountain as a guerrilla base during the anti-Japanese resistance. His son, Kim Jong-il, was officially said to have been born on its sacred slopes—though evidence suggests he was likely born in the Soviet Union. Since then, Mount Paektu has served as a cornerstone of ideological legitimacy for the Kim family’s rule.
‘Jjaepo’: A Stigma That Endures
In North Korean society, rigid hierarchy determines opportunity and status. Those deemed ideologically impure—labeled jjaepo, meaning ‘tainted by foreign or dangerous ideas’—face intense state surveillance. They are routinely barred from elite universities and high-ranking government or military posts.
“The Paektu bloodline is considered sacred,” says Kim Hyung-soo of the North Korea Research Association. “So the idea that the supreme leader is the son of a jjaepo is utterly unthinkable.”
A Cinderella Story—With Consequences
Ko Yong-hui’s rise was extraordinary. A dancer from a modest background, she caught the attention of Kim Jong-il while he was being groomed for succession. At the time, he was married to Kim Yong-suk—the daughter of a senior military official, chosen by his father—and reportedly had two other mistresses. According to Japanese journalist Yoichi Komi, author of a 2025 biography on Ko Yong-hui, her natural beauty and grace captivated Kim Jong-il. He reportedly fell deeply in love and fathered three children with her—including Kim Jong-un.
Yet, the fate of those children—and the enduring political weight of their mother’s origins—remains central to understanding the fragility beneath the Kim dynasty’s carefully curated mythos.