Julius Caesar

Julius Caesar was a Roman general and statesman.

The Sixth Doctor and Evelyn Smythe met Caesar's parents, Gaius Julius Caesar and Aurelia, in 101 and 100 BC. (AUDIO: 100 BC)

The Fifth Doctor claimed to have met Caesar, describing him as "a splendid chap." (PROSE: Empire of Death)

According to one account, the Doctor was the soothsayer who told Caesar to "beware the Ides of March." (PROSE: Doctor Who and the Stones of Blood)

William Shakespeare wrote a play based on the life of Julius Caesar. General Mariah Learman planned to use her time machine to watch the premiere performance of this play. (AUDIO: The Time of the Daleks)

Behind the scenes
The Tenth Doctor once offered to take Rose Tyler to see "Caesar crossing the Rubicon." (TV: Tooth and Claw) While this cannot be, in-universe, confirmed as Julius, in the real world, Julius Caesar did in fact cross the river Rubicon in the year 49 BC.