Yelü Bei
Yelü Ruan, posthumously Emperor Shizong of Liao, was the son of Yelü Bei, and not the designated heir of Emperor Taizong of Liao, who was Yelü Lihu, Taizong's younger brother. However Taizong had raised Ruan after Bei's departure in 930 and the relationship between them was as close as father and son. Ruan participated in the invasion of Later Jin, earning himself as a capable warrior and commander. Upon Taizong's death, Ruan declared himself emperor before "his father's coffin".