Reginault \r(e)-ginau-lt, regi-nault\ as a boy's name is a variant of Reginald (Latin), and the meaning of Reginault is "ruler's advisor".

The baby name Reginault sounds like Regnault, Reginauld and Reginalt. Other similar baby names are Renault, Regnauld, Reginvalt and Rainault.