What was the meaning of Inictatus's owners nickname Caligiula?
Incitatus: Incitatus (] ) was the favored horse of Roman emperor Caligula (reigned 37–41 AD). Caligula:  The young Gaius earned the nickname "Caligula" (meaning "little soldier's boot", the diminutive form of "caliga", hob-nailed military boot) from his father's soldiers while accompanying him during his campaigns in Germania.
little soldier's boot