Surname Мусайев (Musayev 
, Мусайев 
) , in all the world, is a common last name. The cognomen Мусайев is habitual in Azerbaijan, where it is a common surname, Israel, where it is quite a common surname, and Malta, where it is quite a rare surname. Measured by absolute frequency, the name is most common in Azerbaijan, Israel, and Uzbekistan. Much less frequently, Мусайев is the forename as well as the last name.