Where does “Ó Duinn” come from?

Ó Duinn (Irish) comes from Irish Donn, from Old Irish donn, from Proto-Celtic dusnos, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

Ancestry of “Ó Duinn”, step by step

StepLanguageWordMeaning
1IrishDonnthe legendary ancestor of the Gaels
2Old Irishdonnbrown, tawny, dun; hazel; chestnut
3Proto-Celticdusnosdark, brown
4Proto-Indo-Europeandʰewh₂-smoke; mist, haze

Words derived from “Ó Duinn”

Every word from Proto-Indo-European dʰewh₂- →Every word from Proto-Celtic dusnos →Every word from Old Irish donn →