Where does “Le Roi” come from?

Le Roi (English) comes from English Leroy, from French Leroy, from French roi, from Middle French roy, from Old French roi, from Latin rēx, from Proto-Italic rēks, from Proto-Indo-European h₃rḗǵs — to straighten, to right oneself; right; just.

Ancestry of “Le Roi”, step by step

StepLanguageWordMeaning
1EnglishLeroyborne by English speakers
2FrenchLeroyLeroy
3Frenchroiking
4Middle Frenchroyking
5Old Frenchroiking
6Latinrēxking, ruler
7Proto-Italicrēksking
8Proto-Indo-Europeanh₃rḗǵsking, ruler
9Proto-Indo-Europeanh₃reǵ-to straighten, to right oneself; right; just
Every word from Proto-Indo-European h₃reǵ- →Every word from Proto-Indo-European h₃rḗǵs →Every word from Proto-Italic rēks →