Cognomen Robertu (روبرت 
, Роберто 
, روبرتو 
) , all around the world, is a rare surname. The cognomen Robertu is characteristic of Sudan, where it is a rare surname, Iraq, and Algeria. Measured by absolute frequency, it is the most numerous in Northern Africa, particularly Sudan, Egypt, and Algeria. Predominantly, Robertu is the forename as well as the last name.