Cultural note In Brazil and Portugal, the surname has very little importance. People are known by their first and middle names. Most people have four names, a first name, a middle name, a surname inherited from their father and one from their mother. And the first and middle names are the ones people refer to you as. E.g. Cristiano Ronaldo's full name is Cristiano Ronaldo dos Santos Aveiro, and Ronaldo is his middle name.