Last name Оку (奥 
, Oku 
, Okou 
) , all over the world, is a common cognomen. The last name Оку is habitual in Sub-Saharan Africa, particularly Ivory Coast, where it is quite a common surname, Ghana, where it is quite a rare surname, and Nigeria. In absolute terms, it is commonest in China, Nigeria, and Ivory Coast. Likewise, Оку is the forename as well as the last name.