Updated February 28, 2024 Share: Table of contents Boy name origins & meanings Latin : King Boy name variations Rei Rei - 40% this year Neutral Rare Find out more Roi Roi - 9% this year Masculine Rare Find out more Rexford Rexford - 14% this year Masculine Rare Find out more Rexer Rexer 0 % this year Masculine Rare Find out more How Popular Is The Name Rex Family name origins & meanings English : variant of Ricks. German : habitational name from a place so named near Fulda. Latinized form of German Koenig. Appears on 50 Names That Mean King and Royalty for a Regal Baby