From Ó Donnchadha, ‘descendant of Donnchadh’ — the same root personal name as Dunphy and Donoghue, anglicised down a different path.
The Donaghy certificate.
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Gaelic Origin · Root name Donnchadh, from donn, ‘brown’, and cath, ‘battle’
Donaghy anglicises Ó Donnchadha, ‘descendant of Donnchadh’ — the same personal name, built from donn, ‘brown’, and cath, ‘battle’, that gives Dunphy and the more widespread Donoghue. All three took separate anglicised paths from the one root, settling into different regions of Ireland as distinct surnames in their own right.
One root personal name, three surnames, three separate paths through Irish history — Dunphy, Donaghy and Donoghue all still answer to Donnchadh.
Irish form: Ó Donnchadha
