Surname Eou (Eou 
) , all over the world, is a rare family name. The last name Eou is habitual in the Democratic Republic of the Congo, where it is a rare surname, Malaysia, where it is a very rare surname, and Thailand, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in the Democratic Republic of the Congo, Malaysia, and China. Very seldom, Eou is the forename as well as the last name.