O'Donoghue

Donoghue, O'Donoghue or O'Donojú is an anglicized form of the Irish language surname Ó Donnchadha or Ó Donnchú.

The name means means "descendant of Donnchadh", a personal name composed of the elements donn "brown-haired [man]" and cath "battle". Spelling variations (which include an initial "Ó" or omit it) include Donoghue, Donaghoe, Donoughe, Donaho, Donahoe, Donough, Donahue, Donahow, Doneghoe, Donehue, Donighue, Donoho, Donohoe, Donahugh, Donohough, Donohow, Donahue, Donohue, Donaughue, Donaghie, Donaghy, Doughue, Dougue, Donihoo and many more. Some of these variations exist also in Northern Ireland and Scotland with the same meaning in Scottish Gaelic as in Irish.

There are several completely different O'Donoghue families in Ireland.

Daniel P O'Donoghue Principal Lecturer in Geography at Canterbury Christ Church University, UK

...
Wikipedia