Namesakes
Biblical Characters:
1 character
Augustus Caesar (a.k.a. Octavianus) (m) Luke 2:1 
Roman and Byzantine Emperors:
1 emperor
Emperor Gaius Julius Caesar (a.k.a. Octavianus) 27 BC-14
Shakespearian Characters:
1 character
Augustus Caesar; Octavius Caesar (a.k.a. Octavianus) Antony and Cleopatra; Julius Caesar