Where does “Mumhain” come from?

Mumhain (Irish) comes from Old Irish Mumain, from Old Irish Mumu — Munster.

Ancestry of “Mumhain”, step by step

StepLanguageWordMeaning
1Old IrishMumain—
2Old IrishMumuMunster
Every word from Old Irish Mumu →Every word from Old Irish Mumain →