A tathe or tate is a unit of area which was used in Fermanagh and Monaghan, equivalent to 60 Irish acres. [1]
Four tathes make a quarter of land, four quarters make a ballibetagh and, in Fermanagh, seven ballibetaghs make a barony , of which there were seven. [2] However, the measure of a ballybetagh is far larger in Fermanagh than in Monaghan. [2] In total at this period in time (1609), it was estimated that Fermanagh which had 51 ballibetaghs and a half of "chargeable lands" contained the same area as Monaghan which had 100 ballibetaghs. [2]
A quick survey of 1608 found the Tathe to be only half the extent assigned to it by the Irish which was 60 native Irish acres. [3]