Where does “ieu” come from?

ieu (Middle Welsh) comes from Brythonic *Yow, from Latin Iovem, from Proto-Indo-European dyew- — to be bright; sky, heaven.

Ancestry of “ieu”, step by step

StepLanguageWordMeaning
1Brythonic*Yow—
2LatinIovem—
3Proto-Indo-Europeandyew-to be bright; sky, heaven

Words derived from “ieu”

Every word from Proto-Indo-European dyew- →Every word from Latin Iovem →Every word from Brythonic *Yow →