Cognomen Баску (Bascou 
, Баску 
) , worldwide, is quite a rare last name. The cognomen Баску is characteristic of Uruguay, where it is quite a rare surname, France, and Argentina, where it is a very rare surname. Not in comparison with a country's population, it is commonest in France, Uruguay, and the United States. Much less frequently, Баску is the forename as well as the last name.