Last name Mousaelian (Мусаелян 
, Mousaelian 
, Мусаэлян ) , all around the world, is quite a rare surname. The last name Mousaelian is habitual in Russia, where it is quite a rare surname, Kyrgyzstan, where it is a rare surname, and Belarus. Measured by absolute frequency, it is commonest in Eastern Europe, particularly Russia, Ukraine, and Belarus. Much less frequently, Mousaelian is the forename as well as the last name.