Gaius Julius Caesar was born on July 13, 100 BC. Although patrician descent, Caesar's family had not achieved real prominence. His father, also named Gaius Julius Caesar, was the brother-in-law of Gaius Marius and married Aurelia, who was connected with the prominent Aurelii family; he died about 85 BC, however, before reaching the consulship. In 84, Caesar married Cornelia, daughter of Marius's old partner Lucius Cornelius Cinna. When Lucius Cornelius Sulla ordered him to divorce her, he refused and escaped harm through the intervention of such people as his mother's relative, Gaius Aurel…