Although the etymology of the name of julius caesar is not known with certainty, many scholars believed that it was a simply use of the latin expression caesar meaning hairy. the julii caesares were a specific branch of the gens julia.the first emperor caesar augustus, bore the name as a matter of course; born gaius octavius, he was posthumously adopted by caesar in his will, and per roman naming conventions was renamed"-gaius julius caesar octavianus " .