Surname ياسو (Yasu 
, Yaso , ياسو 
) , throughout the world, is a common cognomen. The last name ياسو is characteristic of Egypt, where it is quite a common surname, Japan, where it is quite a rare surname, and Syria. Measured by absolute frequency, it most frequently occurs in Egypt, Japan, and China. Also, ياسو is the forename as well as the last name.