Fir Craibe is a branch of the Fir Ol nEchmacht, one of the ancient peoples of Ireland.
The kingdom of the Fir Craibe extended from Limerick to the Palace of Fidach, a place thought to be located in north-eastern Aidhne.
In later centuries the territory south of Aidhne, Thomond, would be annexed by Munster, which it is still counted as part of.
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