Yang Liang
Yang Liang (楊諒) -- courtesy name Dezhang (德章), alternative name Jie (傑), nickname Yiqian (益錢) -- was an imperial prince of the Chinese dynasty Sui Dynasty. He was a son of Emperor Wen and his powerful wife Empress Dugu, who, during his father's reign, controlled the region north of the Yellow River. After his father's death in 604, he rose against his brother Emperor Yang, but was soon defeated by Emperor Yang's general Yang Su and forced to surrender. He was reduced to commoner rank and imprisoned for the rest of his life.