Wikipedia
Firceall
Firceall was an ancient Gaelic Irish territory which formed the most south - westerly part of the ancient Kingdom of Meath. O'Molloy was chieftain of the territory. Firceall itself comprised the ancient baronies of Ballycowan, Ballyboy and Eglish, which are located in modern day mid County Offaly extending from Durrow north of Tullamore to Eglish on the edge of Birr in an area which is some 25 miles in length by 5 miles in width. The name Firceall comes from the Irish words Fir Ceala meaning Men of the Churches.