Murong De (慕容德) (336–405), name changed in 400 to Murong Beide (慕容備德), courtesy name Xuanming (玄明), formally Emperor Xianwu of (Southern) Yan ((南)燕獻武帝), was the founding emperor of the Chinese/Xianbei state Southern Yan. He was the son of Former Yan's founding prince Murong Huang (Prince Wenming) and younger brother to both Former Yan emperor Murong Jun (Emperor Jingzhao) and Later Yan emperor Murong Chui (Emperor Wucheng), and therefore was an imperial prince and general during the times of both states. After Murong Chui's son Murong Bao lost most of Later Yan's territory to Northern Wei, Murong De took troops under his own command south and established Southern Yan, which secured modern Shandong, but failed to expand further, and was destroyed by Jin Dynasty (265-420) after Murong De's death and succession by his nephew Murong Chao.
Read more about Murong De: During Former Yan, During Former Qin, Reign, Era Names, Personal Information