The Scottish and Irish surname McLachlan is an anglicized form of the Gaelic name Mac Lochlainn meaning “son of the Scandinavian,”a patronymic from the personal name Lochlann. Many Irish bearers of the name claim descent from Lochlann, a 10th century lord of Corcomroe, County Clare. Among the many recordings in Ireland is the marriage of John McLaughlin and Elizabeth Crauffurd on June 23rd 1666 at Derry Cathedral, Templemore. The first recorded spelling of the family name is shown to be that of Teag MacLochlann of Ulster. This was dated 1199, in the Annals of Medieval History for the counties of Donegal and Derry.
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