What is "tomregan"

Tomregan civil parish straddles the international border between the Republic of Ireland and Northern Ireland. The chief town of the parish is Ballyconnell, County Cavan. Most of Tomregan's constituent townlands are situate in County Cavan, with the remainder in County Fermanagh. The Roman Catholic parish of Tomregan was split up in the early 18th century, with the County Fermanagh townlands being assigned to the parish of Knockninny while the County Cavan townlands were united with the parish of Kildallan. The total area of the civil parish is 10,600 statute acres.