Boy name origins & meanings Greek : Watchman Boy name variations Gregory Gregorius Gregorios Gregori Gregoire Greger Gregorio Gregoor Griogair Grioghar Gregus Gragos Greis Grischa Grigor Grigori Gries Gero Greg Graig Greig Gregg Gregson Grig Grigg Grigson McGregor Family name origins & meanings Scottish : reduced form of McGregor.German : from the personal name Gregor, a vernacular form of Latin Gregorius (see Gregory).