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Cognomen Sayu (Sal , Sayu , Саю ) , in the entire world, is a common last name. The family name Sayu is characteristic of Cabo Verde, where it is quite a common surname, Lebanon, and Brunei (explore the name in all countries). In absolute terms, it is commonest in Indonesia, Saudi Arabia, and Algeria. Likewise, Sayu is the forename as well as the last name.