Cognomen Opo (Opo 
, โอปอ 
) , throughout the world, is quite a common surname. The cognomen Opo is habitual in Equatorial Guinea, where it is quite a rare surname, the Democratic Republic of the Congo, and Papua New Guinea. In absolute terms, this name is the most popular in the Democratic Republic of the Congo, Philippines, and Indonesia. Very seldom, Opo is the forename as well as the last name.