Gregory \g-rego-ry, gr(e)-gory\ as a boy's name is pronounced GREG-er-ee. It is of Greek origin, and the meaning of Gregory is "watchful, vigilant". The first of the 16 popes and 10 saints to bear the name was called Gregory the Great. He founded monasteries, reorganized papal administration and fostered the development of the Gregorian chants. Gregor is a Scottish and German variant; Gregori is Russian; Grigor is Welsh and Russian. Actors Gregory Peck, Gregory Hines, Greg Wise, Greg Kinnear; cyclist Greg LeMond; musician Gregg Allman.

Gregory has 18 variant forms: Graig, Greer, Greg, Greger, Gregg, Greggory, Gregoire, Gregoor, Gregor, Gregori, Gregorio, Gregorius, Gregos, Grigor, Grigori, Grigorios, Grygor and Grzegorz.

For more information, see also the related name Grayson.