From Ó Duinn, ‘brown’ or ‘dark-haired’ — a Laois sept that stood alongside the O'Moores.
Gaelic Origin · Root meaning ‘brown, dark-haired’
Dunne comes from donn (‘brown’ or ‘dark-haired’) — a simple, physical byname rather than a title. The Ó Duinn held territory in Laois alongside the more powerful O'Moores, sharing much of that county's turbulent history under plantation.
A plain name for a stubborn people — the Dunnes held their ground in Laois through the same upheavals that scattered grander titles entirely.
Irish form: Ó Duinn
