Cognomen Biyou (必友 , Biyou , 必有 ) , in the entire world, is quite a rare surname. The cognomen Biyou is habitual in Algeria, where it is a rare surname, the Democratic Republic of the Congo, and Morocco. Not in comparison with a country's population, it most frequently occurs in China, the Democratic Republic of the Congo, and Algeria. More prevalently, Biyou is the forename as well as the last name.