Where does “dúthaigh” come from?

dúthaigh (Irish) comes from Middle Irish dúthaig, from Old Irish dú, from Proto-Celtic gdū, from Proto-Indo-European dʰéǵʰōm, from Proto-Indo-European -ōm, from Proto-Indo-European -mi.

Ancestry of “dúthaigh”, step by step

StepLanguageWordMeaning
1Middle Irishdúthaig—
2Old Irishdúplace, spot; someone's particular place; native...
3Proto-Celticgdūplace
4Proto-Indo-Europeandʰéǵʰōmearth
5Proto-Indo-European-ōmemphatic suffix or postpositive particle
6Proto-Indo-European-mi—
Every word from Proto-Indo-European -mi →Every word from Proto-Indo-European -ōm →Every word from Proto-Indo-European dʰéǵʰōm →