金史
The origins of the clan are obscure. According to sources such as the "History of Jin" ("Jinshi" 金史) and the "Research on the Origin of the Manchus" ("Manzhou yuanliu kao" 滿洲源流考), the clan's progenitor Hanpu emigrated from the kingdom of Goryeo or Silla at the age of sixty. However, controversy exists as to the ethno-cultural identity of Hanpu, and the factual validity of the story itself.