Gaius Iulius Iullus was the name of at least six notable Romans. Five of them were consuls and one was dictator.
Read more about Gaius Iulius Iullus: Gaius Iulius Iullus (consul 489 BC), Gaius Iulius Iullus (consul 482 BC), Gaius Iulius Iullus (consul 447 BC), Gaius Iulius Iullus (consular Tribune 408 BC), Gaius Iulius Iullus (dictator 352 BC)