Where does “joi” come from?
joi (Romanian) comes from Latin dies iovis, from Latin diēs, from Proto-Italic djēm, from Proto-Italic *djous, from Proto-Indo-European dyḗws, from Proto-Indo-European dyéws, from Proto-Indo-European dyew- — to be bright; sky, heaven.
joi (Romanian): Thursday
Ancestry of “joi”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Latin | dies iovis | — |
| 2 | Latin | diēs | — |
| 3 | Proto-Italic | djēm | accusative singular of *djous |
| 4 | Proto-Italic | *djous | — |
| 5 | Proto-Indo-European | dyḗws | sky, heaven; sky god |
| 6 | Proto-Indo-European | dyéws | — |
| 7 | Proto-Indo-European | dyew- | to be bright; sky, heaven |