Where does “Iūlius” come from?

Iūlius (Latin) comes 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.

Iūlius (Latin): Of the gens Julia, a patrician Roman family

Definitions

Of the gens Julia, a patrician Roman family

Ancestry of “Iūlius”, step by step

Iūlius traces back through two separate lines of ancestry.

via Latin iuppiter

Step	Language	Word	Meaning
1	Latin	iuppiter	Jupiter god of the sky and ruler of the Roman pantheon
2	Proto-Italic	djous patēr	Jupiter
3	Proto-Italic	*djous	—
4	Proto-Indo-European	dyḗws	sky, heaven; sky god
5	Proto-Indo-European	dyéws	sky, heaven
6	Proto-Indo-European	dyew-	to be bright; sky, heaven

via Ancient Greek ἴουλος

Step	Language	Word	Meaning
1	Ancient Greek	ἴουλος	down, the first growth of the whiskers and beard;...
2	Proto-Indo-European	wēlH-	to roll, to undulate
3	Proto-Indo-European	welH-	to turn, to wind

Words derived from “Iūlius”

Every word from Proto-Indo-European dyew- →Every word from Proto-Indo-European dyéws →Every word from Proto-Indo-European dyḗws →