 Marcus became, in official titulature, Imperator Caesar Marcus Aurelius Antoninus Augustus; Lucius, forgoing his name Commodus and taking Marcus's family name, Verus, became Imperator Caesar Lucius Aurelius Verus Augustus.It was the first time that Rome was ruled by two emperors.In spite of their nominal equality, Marcus held more "auctoritas", or authority, than Verus.