Family name بوسو (Poso 
, Boso 
, Bossou 
) , globally, is a common cognomen. The surname بوسو is habitual in Benin, where it is quite a common surname, Solomon Islands, and Lesotho. Measured by absolute frequency, it is the most numerous in Benin, Philippines, and Italy. Very seldom, بوسو is the forename as well as the last name.