Of Old Norse origin.
Portuguese form of the name Ronald.
From the name Ragnvaldr.
It means “ruler’s adviser”.
From the elements “ragn”, meaning “advice”, “decision”, and “vald”, meaning “ruler”, “might”, “power”.
Other forms of the name are Ronald, Ronnie, Renaud, Ragnvald, Reinaldo, Ron, Raghnall, Naldo, Reino, etc.
Famous bearers are Ronaldo Luís Nazário de Lima known as “Ronaldo”, Ronaldo de Assis Moreira known as “Ronaldinho”.