伏允
Murong Fuyun (慕容伏允) (597–635), formal title Busabo Khan (步薩鉢可汗), was a ruler of the Xianbei state Tuyuhun. He first became ruler when his brother Murong Shifu was assassinated in 597, and became one of the longest-ruling monarchs in Tuyuhun history. During his reign, he had major conflicts with China's Sui Dynasty and Tang Dynasty, and in 635, during a Tang invasion, he was assassinated due to the people's resentment of his hostile attitude toward Emperor Taizong of Tang that led to the invasion.