Cognomen Гаку (Gaku 
, Гаку 
) , across the world, is quite a rare last name. The surname Гаку is characteristic of Gambia, where it is quite a rare surname, Japan, and Kenya, where it is a rare surname. In absolute terms, it most frequently occurs in Japan, Kenya, and Nigeria. Much less frequently, Гаку is the forename as well as the last name.