Donnchadh

Donnchadh is a Gaelic masculine given name. It is composed of the elements donn, meaning "brown"; and chadh, meaning "chief" or "noble". The name is also written as Donnchad, Donncha, Donnacha, Donnchadha and Dúnchad. In English it is pronounced "Dun-uhh-kah" or "Done + Acka".

Modern versions include (in Ireland) Donagh, Donough, Donogh and (in Scotland) Duncan. Also anglicised as Dennis or Denis and Dionysius.

The surnames Donough, McDonagh, , O'Donoghue and Dunphy among others are derived from the given name (In Gaelic: Mac - son of, Ó - of the family of). Another derivation is the name of the Scottish Clan Donnachaidh.

Historically, it can refer to the following:

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