If you mean Caesars -- two of these were Augustus and Tiberius, in the early 1st century A.D. Also Roman commanders -- Vespasian and Titus during the 1st century A.D.

Julius Caeser, and Nero. Marc Antony, Octavian(Augustus Caeser), and Lepidus, were all part of the second Triumvirant. I know you said 2, but I have alot of interest in Roman history.

Vespasian and Aurelius

You want good ones or bad ones? Good guys: Cincinnatus and Graccus (1&2, brothers). Bad ones: Nero and Caligula. ("leaders" is a moot word. You should have been more specific).

1) "Marius and Trajan: Two Great Roman Strategists." "The history is of ancient Rome during the Republic and the Empire. It involves two great Roman leaders, Caius Marius and Marcus Ulpius Trajan. The first was a military leader during the period of the Roman Republic. The second was an Emperor during the period of the Roman Empire." Source: http://stinet.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA145331 2) Of course, there are a lot more, for instance: "Comparison: Caesar, Augustus, and Caligula" "Considering that these historical figures have had an immense impact on the history of Rome, what are their differences in character and how did this lead to the development of their legacy? Sure it can be said that Caesar was the product of the Marian and Sullan era, that Augustus was that of Caesar's, and Caligula of Augustus', but that's to put it very simply. These men changed Rome. Caesar initiated it by being appointed dictator for life and Augustus following suit by introducing true autocracy. Caligula's madness may have been a consequence of his position and times, for he had the power and title to do as he pleased, this power of course, being introduced by his predecessors." Source: http://www.unrv.com/forum/index.php?showtopic=6460&mode=threaded&pid=62408 3) "Plutarch's Lives of the Noble Greeks and Romans is a series of biographies of famous men, arranged in tandem to illuminate their common moral virtues or failings. The surviving Parallel Lives, as they are more properly and commonly known, contain twenty-three pairs of biographies, each pair consisting of one Greek and one Roman, as well as four unpaired, single lives. It is a work of considerable importance, not only as a source of information about the individuals biographized, but also about the times in which they lived." Source and further information: http://en.wikipedia.org/wiki/Parallel_Lives Some of the fampus Roman leader described there are: Romulus, Julius Caesar and Cicero.

Nero and Claudius. Titus Andronicus and Caligula. You could go on and on, were you looking for specific types or particular people.