Reginaldo \r(e)-ginal-do, regi-na-ldo\ as a boy's name is a variant of Reginald (Latin), and the meaning of Reginaldo is "ruler's advisor".

The baby name Reginaldo sounds like Reginauld and Reginalt. Other similar baby names are Reinaldo, Rinaldo, Reynaldo, Reinald, Reginvald and Renaldo.