Suetonius

Gaius Suetonius Tranquillus (Latin: [ˈɡaːiʊs sweːˈtoːniʊs traŋˈkᶣɪlːʊs]), commonly referred to as Suetonius ( swih-TOH-nee-əs; c. AD 69 – after AD 122), was a Roman historian who wrote during the early Imperial era of the Roman Empire. His most important surviving work is De vita Caesarum, commonly known in English as The Twelve Caesars, a set of biographies of 12 successive Roman rulers from Julius Caesar to Domitian.