Ronaldo \r(o)-nal-do, ron(a)-ldo\ as a boy's name is a variant of Ronald (Old Norse), and the meaning of Ronaldo is "ruler's counselor".

The baby name Ronaldo sounds like Rinaldo and Renaldo. Other similar baby names are Arnaldo, Donald, Reynaldo, Reinaldo, Renardo, Renado, Raynaldo, Roald, Ronello, Roneld, Ronal and Ranald.