Where does “Iau” come from?
Iau (Welsh) comes from Middle Welsh ieu, from Brythonic *Yow, from Latin Iovem, from Proto-Indo-European dyew- — to be bright; sky, heaven.
Iau (Welsh): Jupiter, Thursday
Ancestry of “Iau”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Middle Welsh | ieu | — |
| 2 | Brythonic | *Yow | — |
| 3 | Latin | Iovem | — |
| 4 | Proto-Indo-European | dyew- | to be bright; sky, heaven |