Gregorian (adj.)youdaoicibaDictYouDict[Gregorian 词源字典]
"pertaining to Gregory," from Late Latin Gregorianus, from Gregorius (see Gregory). From c. 1600 of church music, in reference to Gregory I the Great (pope from 590-604), who traditionally codified it; 1640s in reference to new calendar (introduced 1582) from Pope Gregory XIII (1572-1585); due to Protestant resistance, the calendar was not introduced in England and the American colonies until 1752.[Gregorian etymology, Gregorian origin, 英语词源]
GregoryyoudaoicibaDictYouDict
masc. proper name, popular in England and Scotland by mid-12c. (Pope Gregory I sent the men who converted the English to Christianity), nativization of Late Latin Gregorius, literally "wakeful" (equivalent to Latin Vigilantius), from Greek gregorios, a derivative of gregoros "to be watchful," from PIE root *ger- "to be awake" (cognates: Sanskrit jagarti "he is awake," Avestan agarayeiti "wakes up, rouses"). At times confused with Latin gregarius (see gregarious).