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.
MandelaXhosa Possibly from Xhosa mandla meaning "district, region". This name was borne by the South African activist and president Nelson Mandela (1918-2013). His family's surname was apparently adopted in the 18th century from an ancestor's given name.
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".