Where does “Ó Maoldúin” come from?

Ó Maoldúin (Irish) comes from Irish Ó, from Irish ua, from Old Irish áue, from Primitive Irish ᚐᚃᚔ, from Proto-Celtic awyos, from Proto-Indo-European h₂ewh₂yos — grandfather.

Ancestry of “Ó Maoldúin”, step by step

Ó Maoldúin traces back through two separate lines of ancestry.

via Irish Ó

StepLanguageWordMeaning
1IrishÓAlternative form of ó used in surnames
2IrishuaArchaic form of ó
3Old Irisháuegrandson
4Primitive Irishᚐᚃᚔdescendant
5Proto-Celticawyos—
6Proto-Indo-Europeanh₂ewh₂yosgrandfather

via Irish Maoldúin

StepLanguageWordMeaning
1IrishMaoldúin—
2Old IrishMáel Dúin—
3Old IrishMáelbald, bare, shaved, shorn, tonsured
4Proto-Celticmailosbald; bare

Words derived from “Ó Maoldúin”

Every word from Proto-Indo-European h₂ewh₂yos →Every word from Proto-Celtic awyos →Every word from Primitive Irish ᚐᚃᚔ →