DesmondIrish Anglicized form of Irish Ó Deasmhumhnaigh meaning "descendant of the man from South Munster", originally indicating a person who came from the region of South Munster (Desmond) in Ireland.
DevlinIrish Anglicized form of the Irish Ó Doibhilin meaning "descendant of Doibhilin", a given name that may be derived from the Gaelic term dobhail meaning "unlucky".
DonovanIrish Anglicized form of the Irish name Ó Donndubháin meaning "descendant of Donndubán".
DouglasScottish From the name of a town in Lanarkshire, itself named after a tributary of the River Clyde called the Douglas Water, derived from Gaelic dubh "dark" and glais "water, river" (an archaic word related to glas "grey, green"). This was a Scottish Lowland clan, the leaders of which were powerful earls in the medieval period.
DoyleIrish From the Irish Ó Dubhghaill, which means "descendant of Dubhghall". A famous bearer was Sir Arthur Conan Doyle (1859-1930), the author of the Sherlock Holmes mystery stories.
DuaneIrish Anglicized form of Irish Ó Dubháin meaning "descendant of Dubhán".
LennonIrish Anglicized form of the Irish name Ó Leannáin, which means "descendant of Leannán". The byname Leannán means "lover". The name was borne by the musician John Lennon (1940-1980).
MacGregorScottish Anglicized form of Gaelic MacGriogair meaning "son of Gregor". It originates from the Highland clan Gregor. A famous bearer was the Scottish folk hero Rob Roy MacGregor (1671-1734).
MacKenzieScottish Anglicized form of Gaelic MacCoinnich meaning "son of Coinneach". It originates from the Kintail area of Scotland on the northwest coast.
McDermottIrish Anglicized form of Irish Mac Diarmada meaning "son of Diarmaid". The McDermotts were nobility in the Kingdom of Connaught, a province in Ireland.
McDevittIrish Anglicized form of Irish Mac Daibhéid meaning "son of Dáibhí".
TaggartIrish, Scottish Anglicized form of Irish Mac an tSagairt meaning "son of the priest". This name comes from a time when the rules of priestly celibacy were not strictly enforced.