Family name גאקו (Gaku 
, גאקו) , throughout the world, is quite a rare cognomen. The family name גאקו is habitual in Gambia, where it is quite a rare surname, Japan, and Kenya, where it is a rare surname. In absolute terms, this name is the most popular in Japan, Kenya, and Nigeria. Much less frequently, גאקו is the forename as well as the last name.