Shan Yu is a character's personal name in Mulan and Kingdom Hearts II. This is similar to the historical Shanyu or Chanyu, which was the title used by the rulers of the Xiongnu, a nomadic Altaic people. As did the fictional Shan Yu in Mulan, the Xiongnu threatened China's northern border during the Han dynasty. Although Shan Yu is identified as a Hun in the film, there is some debate over the relationship between the Xiongnu and the Huns. Surprisingly, he is one of two Disney villains introduced in the 90s to not have his own theme, the other being Clayton from Tarzan (1999 film). His seiyū is Hiroshi Fujioka.