First found in County Meath (Irish: An Mhí) anciently part of the kingdom of Brega, located in Eastern Ireland, in the province of
Leinster, where they held a family seat from very ancient times, long before the Norman Conquest of in 1066 A.D.
The names O’Loughlin and McLoughlin in Ireland are of completely different origin. O’Loughlin is derived from the native Gaelic Sept O’Lochlainn that was based in Counties Clare and Limerick. Loughnane is a variant. MacLoughlin is derived from the Mac Lochlainn Sept that was very prominent in Counties Donegal and Derry and who were a branch of the ruling Ui Neill Sept. MacLaughlin is a variant of this name.