Family name Гийу (Guillou 
, Guilloux 
, Guilleux 
) , across the world, is a common last name. The last name Гийу is characteristic of Guernsey, where it is quite a common surname, France, and Guadeloupe (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in France, the United States, and the Democratic Republic of the Congo. Much less frequently, Гийу is the forename as well as the last name.