I have found that, like Dongfang ??, Ouyang (??) and Sima (??),
Murong / Mou Yung / Mu Jung / Miu Yung ?? is also a compound family name.

If nobody stops me in 15 days I will change the following names:

??? / (Mu Yong-Sheng)
??? / (Miu Yung-Gung)
??? / (Mu Jung-Mei)
??? / (Mu Jung-Chong)