Meaning and name origin
Reginaldo \r(e)-ginal-do, regi-na-ldo\ as a boy's name is of Latin origin, and the meaning of Reginaldo is "ruler's advisor". Reginaldo is a variant of Reginald (Latin): from Reginaldus, influenced by Latin Regina meaning "queen". A name for babies that is not broadly used.
Reginaldo has 1 variant form: Reginauld.
Reginaldo is not a popular first name for males but a somewhat popular surname or last name for all people (#79271 out of 88799, Top 89%) (Source: 2000 U.S. Population Census).
Displayed below is a comparison of the popularity of the boy name Reginaldo and its variant forms. The only popular variation form ranked in the Top 1000/100 is Reginald (#805). (Source: 2014 Birth Name Statistics).