Iulius is the Latin form of Julius, an ancient Roman family name with a rich history. Its ultimate etymology is uncertain: it may derive from Greek ἴουλος (ioulos) meaning "downy-bearded," or alternately be related to the name of the Roman god Jupiter. The name belongs to the Julia gens, one of the most prominent patrician families of the Roman Republic, which claimed descent from the mythological figure Julus, son of Aeneas. Historical significance The most famous bearer of the name Iulius—albeit in its Latin form Gaius Iulius Caesar—was Gaius Iulius Caesar. He conquered Gaul, led a civil war, and became dictator of the Roman Republic before his assassination in the Senate in 44 BC. His adoptive heir, Octavian (later Emperor Augustus), carried the name into the Julio-Claudian dynasty, which ruled Rome for much of the first century AD. Members of the gens Julia held the highest offices of state from as early as 489 BC, beginning with Gaius Julius Iulus, consul in that year. Religious and cultural context Although the name Iulius was borne by several early saints—including a pope—it was remarkably rare during the Middle Ages. The name saw a revival in Italy and France during the Renaissance, leading to its subsequent popularity across Europe. Variants include the feminine Iulia (Latin) and Julia (English), as well as forms in other languages such as Italian Giulio, French Jules, and Polish Juliusz. The place name forum Iulii (modern Fréjus in France) derives from the gens. Key facts Meaning: Possibly "downy-bearded" or related to Jupiter Origin: Latin (Ancient Roman) Type: First name Feminine forms: Iulia, Julia