I couldn’t resist sending you more simple Lilly’s from the Tithes Applotment Books 1823-1837 based upon Irish Genealogy Hub’s listing, which are quicker to lookup if you know the parish! The relevant original books are in the
Public Record Office of Northern Ireland (PRONI) Belfast
Cleenish parish is about 3 miles south of Enniskillen running east to west, aghevea ia two parishes eastwards. Inishmacsaint is to the northwest of inniskillen running east to west for more see the map and copy it from
https://www.ancestryireland.com/civil-parish-maps-for-ulster/civil-parishes-of-county-fermanagh/ with a list of the parishes,
For locations of the two
Denis/Dennis Lilly below
Derins east now spelt
Derreens-East is located at 54° 17' 11" N, 7° 42' 53" W.
https://www.townlands.ie/fermanagh/clanawley/cleenish/derreens-east/ Map
Leeter is located at 54° 27' 13" N, 7° 54' 5" W.see
https://www.townlands.ie/fermanagh/magheraboy/inishmacsaint/letter/ Map
Comment disappointing if you hoped for Enniskillen itself
entries for Fermanagh include
Lilley, Owen-Townland: Aughnaclough Year: 1832-Aghavea-Fermanagh
Lilly, Bernard-Townland: Drummelly Year: 1834-Cleenish-Fermanagh
Lilly, Charles-Townland: Drummelly Year: 1834-Cleenish-Fermanagh
Lilly, Denis-Tl: Leeter Yr: 1834-Inishmacsaint -Fermanagh
Lilly, Dennis-Townland: Derins East Year: 1834-Cleenish-FermanaghLilly, Edwd.-Townland: Derins East Year: 1834-Cleenish-Fermanagh
Lilly, Francis-Townland: Mullynawinna Year: 1834-Cleenish-Fermanagh
Lilly, Frank-Townland: Derryhurra or Derryhora Year: 1834-Cleenish-Fermanagh
Lilly, James-Tl:Cavan Yr: 1829-Magheracross-Fermanagh
Lilly, James-Townland: Drummaren Year: 1834-Cleenish-Fermanagh
Lilly, James-Townland: Drummelly Year: 1834-Cleenish-Fermanagh
Lilly, James-Townland: Minevaigy Year: 1834-Cleenish-Fermanagh
Lilly, John-Townland: Mullymesker Year: 1834-Cleenish-Fermanagh
Lilly, Mathw.-Townland: Leamore Year: 1834-Cleenish-Fermanagh
Lilly, Michael-Townland: Drummelly Year: 1834-Cleenish-Fermanagh
Lilly, Owen-Townland: Farnamullan Year: 1834-Cleenish-Fermanagh
Lilly, Owen-Townland: Mullynawinna Year: 1834-Cleenish-Fermanagh
Lilly, Patrick-Townland: Corrilea Year: 1834-Cleenish-Fermanagh
Lilly, Patrick-Townland: Derins West Year: 1834 Notes: and Company -Cleenish-Fermanagh
Lilly, Patrick-Townland: Greenwoodhill Year: 1834-Cleenish-Fermanagh
Lilly, Patrick-Townland: Minevaigy Year: 1834-Cleenish-Fermanagh
Lilly, Patrick-Townland: Toneylisderritt Year: 1834-Cleenish-Fermanagh
Lilly, Patrick-Townland: Toppin Year: 1834-Cleenish-Fermanagh
Lilly, Patrick, Jr.-Townland: Drummelly Year: 1834-Cleenish-Fermanagh
Lilly, Patrick, Sr.-Townland: Drummelly Year: 1834-Cleenish-Fermanagh
Lilly, Peter-T: Ballintarson Y: 1835-Derryvullan-Fermanagh
Lilly, Thomas-Townland: Corryglass Year: 1834-Cleenish-Fermanagh
Lilly, Widow Townland: Skea Year: 1834-Cleenish-Fermanagh