Donnchadh

Donnchadh ({{IPA|gd|ˈt̪ɔn̪ˠɔ.xəɣ}}){{cite web |title=Donnchadh |url=https://www.faclair.com/ViewEntry.aspx?ID=2ECD3FE78CFE30D260924A09CE886486 |website=Am Faclair Beag (Gaelic Dictionary) |accessdate=20 May 2019}} is a masculine given name common to the Irish and Scottish Gaelic languages. It is composed of the elements donn, meaning "brown" or "dark" from Donn a Gaelic God; and chadh, meaning "chief" or "noble".{{cite book|title=Oxford Dictionary of Names|last1=Hanks|first1=Patrick|last2=Hodges|first2=Flavia|editor=Hardcastle, Kate|author-link1=Patrick Hanks|year=2006|edition=2nd|publisher=Oxford University Press|location=Oxford|isbn=978-0-19-861060-1|pages=81, 402}}{{cite book |last=Ó hÓgáin |first=Dáithí |title=The Sacred Isle: Belief and religion in pre-Christian Ireland |publisher=Boydell & Brewer |year=1999 |pages=27, 58}}{{cite book |last=Ó hÓgáin |first=Dáithí |title=Myth, Legend & Romance: An encyclopaedia of the Irish folk tradition |publisher=Prentice Hall Press |year=1991 |pages=165–166, 154}} The name is also written as Donnchad, Donncha, Donnacha, Donnchadha and Dúnchad. Modern versions include (in Ireland) Donnacha, Donagh, Donough, Donogh and (in Scotland) Duncan.

The Irish surnames Donough, McDonagh, McDonough, 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.{{cn|date=May 2019}}