 Clan Maclachlan claims descent from Lachlan Mor, who lived on the shores of Loch Fyne in the 13th century.Lachlan belonged to the family who originally emigrated from Ireland to Scotland in the 11th century.see Irish clan McLaughlin (surname) The progenitor of this family, Anrothan, son of Aodh O'Neil, king of the north of Ireland, is said to have married the heiress of the King of Scots and gained lands campaigning there.