Cognomen Рональдо (Ronaldo 
, Рональдо 
, Ronaldu 
) , in the entire world, is a common surname. The cognomen Рональдо is characteristic of Nicaragua, where it is quite a common surname, Egypt, and Algeria (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in Egypt, Indonesia, and Algeria. More frequently, Рональдо is the forename as well as the last name.