Where does “rígad” come from?

rígad (Old Irish) comes from Middle Irish ri, from Old Irish rí, from Proto-Celtic rīxs, from Proto-Indo-European h₃rḗǵs, from Proto-Indo-European h₃reǵ- — to straighten, to right oneself; right; just.

Ancestry of “rígad”, step by step

StepLanguageWordMeaning
1Middle Irishriking
2Old Irishríking
3Proto-Celticrīxsking
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-Celtic rīxs →
rígad — Etymology, Origin & Word History | Etymology Explorer