Question: The adopted son and heir of the founder of the Roman Principate was given what name at birth?
Sentence (from "Murong Xi"): After Empress Fu died in 407, he left the capital Longcheng (龍城, in modern Jinzhou, Liaoning) to bury her, and the soldiers in Longcheng took this chance to rebel and replace him with Murong Bao's adopted son Murong Yun (Emperor Huiyi), and Murong Xi himself was captured and killed.
Relevant evidence: No