范延光
It is not known when Fan Yanguang was born, but it is known that he was from Linzhang (臨漳, in modern Handan, Hebei). In his youth, he came to serve as a guard at the prefectural government of Xiang Prefecture (), which Linzhang belonged to. When Li Siyuan, then a general of Jin under his adoptive brother Li Cunxu the Prince of Jin, was serving as the prefect of Xiang Prefecture, Fan became part of his guard corps.