Family name Guero (Guero 
, Геро 
, Guéro 
) , all over the world, is quite a rare cognomen. The last name Guero is habitual in Bulgaria, where it is quite a rare surname, Niger, and Ivory Coast. Not in comparison with a country's population, it is the most numerous in Mexico, Niger, and Ivory Coast. Also, Guero is the forename as well as the last name.