Ancient Divisions of Land in Ireland
10 acres - 1 gneeve2 gneeeves - 1 sessiagh
3 sessiaghs - 1 tate of Ballyboe
2 ballyboes - 1 ploughland, seisreigh or carrow
4 ploughlands - 1 ballybetagh or townland
4 ballybetaghs - 1trioca-cead or barony
Barony, townland, gneeve and ploughlands were the only areas noted by the enumerators as existing in the census of 1821
Baronies were originally feudal military jurisdictions but were subsequently used foe fiscal administrative purposes only - 327 baronies in Ireland in 1901.
Parishes were originally ecclesiastical divisions, afterwards and up till recently they were and area for civil purposes - 2428 civil parishes in Ireland in 1901.
Townlands. There were 60,462 townlands in Ireland in 1901.