Hi mayanbilly,
Griffiths Valuations which took place in Tyrone in 1851 list only one Menagh ...
Eliza Menagh, Moy, Clonfeacle. Tyrone
There weren't many Menaghs in Ireland at the time of the Valuations.
The others were in Armagh (1854), Derry (1858-9) and Down (1863-4).
Ann, Ballyhackamore, Holywood. Down
John, Ballynagarrick Upper, Tullylish. Down
James, Ballybeen, Comber. Down
Ellen, Blindgate St., Coleraine, Coleraine. Derry
William, Village of Poyntzpass, Bridge Street, Ballymore. Armagh
Sarah, Strabane Old Road, Derry, Clondermot. Derry
Christopher