MacLaughlin, Mac Lochlainn
A Gaelic surname meaning descendant of Lochlainn, which personal name probably meant ‘Viking’.
The sept was named for Lochlainn of whom it is said was killed by his own people in 1023.
The leading sept of the Cineál Eoghain and of the northern Uí Néill until displaced by ó Neill. Their territory was Inishowen, the original territory of the Cineál Eoghain.
The Mac Lochlainn provided eleven Kings of the Cineál Eoghain and two High Kings of Ireland between 1061 and 1241.
In 1090 Domhnall established himself as High King and in 1149 Muirchertagh assumed the High Kingship.
The last Mac Lochlainn King of Tír Eoghain was Domhnall who was killed at the Battle of Cam Eirghe by the combined forces of the ó Neill and ó Domhnaill.
After their defeat by ó Neill in 1241 their power fell into decline and they were displaced as lords of Inishowen by the ó Dochartaigh who were a Cineál Chonaill sept.
They are most numerous in the Inishowen peninsula of Donegal and the City of Derry.
A branch settled in Mayo in the seventeenth century.
In 1890, MacLaughlin was the twenty-first most numerous surname and the estimated number of bearers was 17,500, and the surname was principally found in Antrim, Donegal and Derry.
The surname McLoughlin was chiefly found in Dublin and scattered throughout Ireland.
In the United States McLaughlin is the 440th most numerous surname with an estimated 71,500 bearers. It is numerous in the states of Delaware, New Jersey, and Pennsylvania.
McLaughlin of Donegal
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