Where does “Iūlia” come from?
Iūlia (Latin) comes from Latin Iūlius, from Latin iuppiter, from Proto-Italic djous patēr, from Proto-Italic *djous, from Proto-Indo-European dyḗws, from Proto-Indo-European dyéws, from Proto-Indo-European dyew- — to be bright; sky, heaven.
Ancestry of “Iūlia”, step by step