Family name Соу (Sou 
, 宗 , Sōu ) , worldwide, is a widespread last name. The cognomen Соу is characteristic of Macao, where it is a common surname, Tunisia, where it is quite a common surname, and Algeria (explore the name in all countries). Not in comparison with a country's population, it is commonest in China, Algeria, and Tunisia. Much less frequently, Соу is the forename as well as the last name.