in case you dont know
1833-4 Tithes Applotment book has not survived further new work on tyrone see
https://www.cotyroneireland.com/tithe/donagheadytithe.html a partial list has been discovered but no Nixon recorded
1858 Griffiths Valuation has
Nixon Andrew Castlewarren Donaghedy Tyrone map ref 1d
Nixon Andrew, Jr. Castlewarren Donaghedy Tyrone map ref 6a
Nixon Andrew, Sr. Castlewarren Donaghedy Tyrone map ref 6b
Nixon James Castlewarren Donaghedy Tyrone map ref 1c
Nixon James Jas Castlewarren Donaghedy Tyrone map ref 1e
Nixon James, Jr. Castlewarren Donaghedy Tyrone map ref 4-b
Nixon James, Sr. Castlewarren Donaghedy Tyrone map ref 4c
Nixon Robert Castlewarren Donaghedy Tyrone map ref 1a
Nixon Sarah Castlewarren Donaghedy Tyrone map ref 1g
a lot moreinformation exists each persons building valuation and size of land used. Those in map ref 1 must have had very difficult land. if you look up each plot you can also see the house with fences and boundaries for each tenant. the main landlord is Marguis of Abercorn [the Hamilton family. Anndre junior is subleasing 4c to his father. you can then relate to from map of about the date to satellite and ofrten the same blg site is still in use today. I was a bit surprised not to find John Nixon however the valuation books continued
and kept online at PRONI examples
Castlewarren - Castlewarren Donaghedy Tyrone 1860 1863
Castlewarren - Castlewarren Donaghedy Tyrone 1864 1880
Castlewarren - Castlewarren Donaghedy Tyrone 1881 1881
Castlewarren - Castlewarren Donaghedy Tyrone 1882 1893
Castlewarren - Castlewarren Donaghedy Tyrone 1894 1907
Castlewarren - Castlewarren Donaghedy Tyrone 1908 1921
Castlewarren - Castlewarren Donaghedy Tyrone 1921 1924
Castlewarren - Castlewarren Donaghedy Tyrone 1923 1929
you will be glued for hours no quick way to find relatives unless they existed in 1901 census here are the over 41 ie b before 1860
Nixon Bessie 60 Irish Church Wife Married
Nixon David 44 Farmer and Grocer Church of Ireland Head of Family married
Nixon Margaret 45 Church of Ireland Wife Married
Nixon Nancy 50 General Servant-Domestic Church of Ireland Servant Not married
Nixon Samuel 52 Retired Farmer Church of Ireland Brother in Law Not Married
Nixon William 45 Farmer Church of Ireland Head of Family Married
Nixon William 55 Farmer Irish Church Head of Family Married
Nixon William James46 Farmer Irish Church Head of Family Married
https://cotyroneireland.com/sphider/search.php?query=nixon+castlewarren&type=and&results=50&search=1 has Nixon in Castlewarren entries this is an excellent website
example a oneliner produced this
John Nixon Castlewarren 1835 will destroyed
Thomas Nixon Castlewarren 1740 will destroyed
so the family was there in 1740 nearly 300 years worth searching further