He was the son of Huan Shu of Quwo, half-brother of Count Zhuang of Quwo, and the progenitor of the Han state.
Han Wan was a charioteer for his nephew, Duke Wu of Quwo, and helped to kill Marquess Ai of Jin.
Duke Wu of Quwo then took over the throne of Jin, and bestowed Han Wan the land of Han.
Han Wan's descendants became high-ranking officials in the Jin state.
The family became very powerful and eventually partitioned the Jin state.