CaligulayoudaoicibaDictYouDict[Caligula 词源字典]
cognomen of the third Roman emperor (12 C.E.-41 C.E.), born Gaius Caesar. The nickname is Latin, literally "little boot," given when he joined his father on military campaigns when still a toddler, in full, child-sized military gear; diminutive of caliga "heavy military shoe," which is of unknown origin.[Caligula etymology, Caligula origin, 英语词源]