Surname Alsu (Алсу 
, Alsu 
, アルス 
) , in the world, is quite a rare family name. The last name Alsu is habitual in Western Asia, particularly Saudi Arabia, where it is quite a rare surname, Georgia, and Qatar. Not in comparison with a country's population, it most frequently occurs in Russia, Saudi Arabia, and Uzbekistan. More frequently, Alsu is the forename as well as the last name.