`` Caligula '' ( Latin : Gaius Julius Caesar Augustus Germanicus ; ) was the popular nickname of Gaius ( 31 August 12 AD - 22 January 41 AD ) , Roman emperor from 37 AD to 41 AD .
Caligula ( Gaius Julius Caesar Augustus Germanicus , 31 August AD 12 - 24 January AD 41 ) , was the third Roman Emperor .