Ciriaco is a male given name in Italian (pronounced [tʃiˈriːako]) and Spanish (pronounced [θiˈɾjako]).
In Portuguese, it's spelled Ciríaco (pronounced [siˈɾjaku]).
It derives from the Greek given name Κυριακός (also Κυριάκος) which means of the Lord or lordly; from the Greek kύριος, kyrios: lord.
Thus it is equivalent in meaning to names like Dominic, Dominicus and Domenico.
It may refer to: