Where does “Regis” come from?

Regis (English) comes from Latin regis, from Latin rex, from Proto-Italic rēks, from Proto-Indo-European h₃rḗǵs, from Proto-Indo-European h₃reǵ- — to straighten, to right oneself; right; just.

Ancestry of “Regis”, step by step

StepLanguageWordMeaning
1Latinregisgenitive singular of rēx; second-person singular...
2Latinrexking, ruler; despot, tyrant; king
3Proto-Italicrēksking
4Proto-Indo-Europeanh₃rḗǵsking, ruler
5Proto-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 →
Regis — Etymology, Origin & Word History | Etymology Explorer