Hi fastfreddie,
Further to Jack’s post here are a few more references:
Index to the Tithe Applotmant Books, 1823 - 1838
   Liggett, George - Parish of Seagoe, Townland of Clanrolla (1834)
   Liggett, John - Parish of Loughgilly, Townland of Ballainen (1834)
   Liggit, Wm. - Parish of Seagoe, Townland of Drumgor (1834)
   Liggott, George - Parish of Drumcree, Townland of Breagh West (1828)
   Liggott, John - Parish of Ballymore, Townland of Tullyhugh (1830)
   Liggott, Robert - Parish of Ballymore, Townland of Tullyhugh (1830)
   Liggott, Samuel - Parish of Ballymore, Townland of Glasdruman (1830)
Griffiths Valuation, 1847 - 1864
   Liggett, Thomas - Parish of Armagh, Townland of Corporation
   Liggett, Thomas - Parish of Newry, Town of Newry
   Legget, John - Parish of Ballymore, Townland of Aghantaraghan
   Legget, Thomas - Parish of Ballymore, Townland of Ballynagreagh
   Ligget, Robert - Parish of Ballymore, Townland of Ballyreagh
   Ligget, Charles - Parish of Creggan, Town of Crossmaglen
   Leggett, John - Parish of Ballymore, Townland of Mullaghglass
   Leggett, Thomas - Parish of Ballymore, Townland of Tullyhugh
   Leggett, Samuel - Parish of Ballymore, Townland of Tullyhugh
   Leggett, John - Parish of Ballymore, Townland of Tullyhugh
   Leggett, Susanna - Parish of Drumcree, Town of Porta
   Leggett, Saunders - Parish of Drumcree, Townland of Drummenagh
http://www.askaboutireland.ie/griffith-valuation/index.xmlBassett’s Book of County Armagh 1888
Farmers & Residents:
   Leggett, Sl., Tullyhugh
   Leggett, - Aghantaraghan
   Liggett, Thos., Ballynagreagh
   Liggett, John, Mullaghglass
Cheers,
Janet.