Lucius Tarquinius Superbus
Sextus Tarquinius was the third and youngest son of the last king of Rome, Lucius Tarquinius Superbus, according to Livy, but by Dionysius of Halicarnassus he was the oldest of the three. According to Roman tradition, his rape of Lucretia was the precipitating event in the overthrow of the monarchy and the establishment of the Roman Republic.