BoyleIrish From Irish Ó Baoighill meaning "descendant of Baoigheall". The meaning of the given name Baoigheall is uncertain, but it is thought to be connected to Irish geall meaning "pledge".
BradenIrish Anglicized form of Irish Ó Bradáin meaning "descendant of Bradán".
BradyIrish Anglicized form of the Irish name Ó Brádaigh meaning "descendant of Brádach". A famous bearer is the American football quarterback Tom Brady (1977-).
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".
DohertyIrish From the Irish Ó Dochartaigh meaning "descendant of Dochartach". The byname Dochartach means "obstructive".
DonnellyIrish From Irish Ó Donnghaile meaning "descendant of Donnghal". The given name Donnghal means "brown valour", from donn "brown" and gal "valour". This surname is associated with the descendants of Niall of the Nine Hostages.
DoyleIrish From the Irish Ó Dubhghaill, which means "descendant of Dubhghall". A famous bearer was Arthur Conan Doyle (1859-1930), the author of the Sherlock Holmes mystery stories.
DriscollIrish From Irish Ó hEidirsceóil meaning "descendant of the messenger".
DuaneIrish Anglicized form of Irish Ó Dubháin meaning "descendant of Dubhán".
Duffy 1Irish Derived from Irish Ó Dubhthaigh meaning "descendant of Dubthach". Their original homeland was Monaghan where the surname is still the most common; they are also from Donegal and Roscommon.
FinneganIrish Anglicized form of Irish Ó Fionnagáin meaning "descendant of Fionnagán". The given name Fionnagán is a diminutive of Fionn.
FlanaganIrish From Irish Ó Flannagáin meaning "descendant of Flannagán". Flannagán is a given name meaning "blood red". From County Roscommon in Ireland, it has many other spellings.
KavanaghIrish Derived from the Irish Gaelic name Caomhánach, which means "a student of saint Caomhán". It was the name used by a 12th-century king of Leinster, Domhnall Caomhánach, the eldest son of the historic Irish king Diarmait Mac Murchada.
Kelly 1Irish Anglicized form of Irish Ó Ceallaigh meaning "descendant of Ceallach". Famous bearers include actor and dancer Gene Kelly (1912-1996) and actress and princess Grace Kelly (1929-1982).
KennedyIrish From the Irish name Ó Cinnéidigh meaning "descendant of Cennétig". This surname was borne by assassinated American president John F. Kennedy (1917-1963).
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.
McCauleyIrish, Scottish Anglicized form of Gaelic Mac Amhalghaidh or Mac Amhalghadha meaning "son of Amhalghaidh". The given name Amhalghaidh, from Old Irish Amalgaid, is of uncertain meaning.
McCulloughIrish Anglicized form of Irish Mac Cú Uladh meaning "son of Cú Uladh". The byname Cú Uladh means "hound of Ulster". This surname has also been associated with Old Irish cullach "boar".
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".