Main Page | See live article | Alphabetical index Two notable individuals of the Roman Empire were commonly called Gaius Caesar. The first Gaius Caesar was the son of Agrippa and Julia, and the heir apparent to Augustus Caesar, but died in 4 AD. The second was the emperor Gaius Julius Caesar Germanicus, better known as Caligula. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.