Where does “Roi Et” come from?

Roi Et (English) comes from Thai ร้อยเอ็ด, from Thai ร้อย, from Proto-Tai *roːjꟲ.

Ancestry of “Roi Et”, step by step

StepLanguageWordMeaning
1Thaiร้อยเอ็ดone hundred and one
2Thaiร้อยhundred; 100; lieutenant; to thread; to stitch
3Proto-Tai*roːjꟲ—
Every word from Proto-Tai *roːjꟲ →Every word from Thai ร้อย →Every word from Thai ร้อยเอ็ด →