Do you happen to know what religion they were? My 3x gt grandfather Henry Dougherty/Doherty b c 1787 was from Coolkeeragh which is adjacent to Enagh Lough. At least at his generation onwards my Dougherty family were Presbyterians and attended Glendermot Presbyterian Church.
Henry died in 1877 and was survived by his wife but her name was not given in his will. The children listed were my gt-gt grandfather William John (b c1836), Martha born c1832/1838 (difft dates on US census, married name SEARLES), Catherine b 1843 (m Lowther) and Margaret, Mary Jane & Eliza. I have not been able to trace the marriages or families of these last three.
Tithes show a Henry Doherty and Hugh Doherty at Culkeeragh, ?1830s. Also the 1835 census has:
1835 Census Killkeeraughmore
Henry DOGHERTY
Hugh DOGHERTY
William DOGHERTY
Index of Derry Wills 1612 – 1858
1812 Michael DOUGHERTY Coolkeeraugh, p Upper Langfield
1789 Daniel DOUGHERTY Dressogue, p Longfield
1809 Neill DOUGHERTY Dressog, p Langfield
1839 James DOUGHERTY Dressog,
1805 John DOUGHERTY (farmer) Gortinaire, Liberties of L’derry, p Glendermott
Hope something in there may be of use, though there is nothing immediately obvious.
Cheers
Linda (NZ)