He is more known as "Marcelinho Paraíba", because "Marcelinho" is very common nickname to players here in Brazil, so to distinguish from others with the same name, people add the state's name that he is from to specify when talking about him. And an exemple of that is Marcelinho Carioca, with the "Carioca" being a gentilic added to indicate that is from Rio de Janeiro.
https://en.wikipedia.org/wiki/Marcelinho_Paraiba