Gaius Julius Caesar

In 84 or 83 BC, he married Cornelia, daughter of Lucius Cornelius Cynna, a Roman politician leader of the Popular party.

An excerpt from the article 30 facts about Gaius Julius Caesar

Cornelia was the first wife of Julius Caesar, entering into marriage when she was 14 years old. From this marriage came Caesar's only legitimate child, Julia. The marriage to Cornelia lasted about thirteen years, and she died suddenly in 69 or 68 BC. The cause of death is unknown, however, the most common hypothesis is that she may have died in childbirth.