Cognomen Otso (Ocho 
, Otso 
) , in all the world, is quite a rare family name. The last name Otso is habitual in Ivory Coast, where it is quite a rare surname, Georgia, and Philippines. Not in comparison with a country's population, the name is most common in Philippines, Nigeria, and Ivory Coast. Likewise, Otso is the forename as well as the last name.