McDevitt

McDevitt is an Irish surname, originating in County Donegal in the northwest part of Ireland. The family-name is a member of the ancient “Northern O’Néill” group of clans who resided in the Ulster province of Ireland.
This surname developed as a side-branch of the larger O'Doherty family, who were the historic chiefs of the Inishowen peninsula in northern County Donegal. The McDevitt family name arose with the 1208 death of Davitt O’Doherty, a lesser chieftain within the O'Doherty family. Thus, McDevitt = son of Davitt. Later in Donegal, and working with the O'Doherty clan, the family was involved in some of the Irish Wars of the late 1500s. In 1608, the unsuccessful rebellion of Cahir O'Doherty (assisted by his kinsman Phelim Reagh MacDavitt), led to the seizure of the O’Doherty lands by the English, and the dispossession of the McDevitt family. This rebellion, with its defeat, was one of the major events leading to the Plantation of Ulster.
The O’Dohertys are named after Dochartach, a chief of the 10th century, and a member of the Cenél Conaill (clan group) dynasty which in medieval Irish history texts traced itself to Niall of the Nine Hostages. Niall was a major Irish king who gave his name to the Uí Néill families of the northern and northwestern parts of Ireland. 
After Cahir O'Doherty's rebellion, some of Phelim Reagh MacDavitt’s family remained in Donegal, near the city of Derry. Others relocated to new areas, mainly eastward into County Armagh and County Louth. In those two counties, the family name branched phonetically and evolved into the McKevitt name, where the "D" sound was lightly-sounded and then lost. The two family names are now distinct, but remain related. Today, the McDevitts, although still a small family, reside in all areas of society in the modern world. They have spread throughout Ireland, into the U.K., to Canada, to the U.S., and into Australia. There are also several spelling variations now being used, such as McDavitt, McDivitt and, as a distinct variant: McDaid and McDade. In Irish, the name is written Mac Daibhéid.
The name McDevitt may refer to: