Cognomen Oyou (Oyou ) , across the world, is quite a rare surname. The family name Oyou is characteristic of the Democratic Republic of the Congo, where it is quite a rare surname, Ivory Coast, and Malaysia, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in the Democratic Republic of the Congo, Ivory Coast, and China. Very seldom, Oyou is the forename as well as the last name.