Where does “Ó Duinnchinn” come from?

Ó Duinnchinn (Irish) comes from Irish ceann, from Middle Irish cenn, from Old Irish cenn, from Proto-Celtic Kʷennowindos, from Proto-Celtic windos, from Proto-Indo-European windo-, from Proto-Indo-European weyd- — to see.

Ancestry of “Ó Duinnchinn”, step by step

Ó Duinnchinn traces back through two separate lines of ancestry.

via Irish ceann

StepLanguageWordMeaning
1Irishceannhead; head of cabbage, capitulum; end, extremity
2Middle Irishcennhead; end
3Old Irishcennhead; end
4Proto-CelticKʷennowindoswhite-headed, white-faced
5Proto-Celticwindoswhite
6Proto-Indo-Europeanwindo-—
7Proto-Indo-Europeanweyd-to see

via Irish Donn

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 Duinnchinn”

Every word from Proto-Indo-European weyd- →Every word from Proto-Indo-European windo- →Every word from Proto-Celtic windos →