I read thru the contributions and would offer a little more detail apart from Ros Davies Co Down website ie
http://www.rosdavies.com already mentioned1796 no entries in Flax ~Growers of Ireland
1823-1837 Tithes Applotment Books based upon the index work of the Irish Genealogy Hub’s listing for each parish in Northern Ireland, 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
Eady, T.-Townland: Donaghadee Year: 1834-Donaghadee-Down-
Eady, Thos.-Townland: Ballyvester Year: 1834-Donaghadee-Down-
Eady, Thos.-Townland: Donaghadee Year: 1834-Donaghadee-Down-
I went looking for Bill Cardwell photos of individual tombstones in cemeteries around Donaghadee, yo my concern yet another most useful website has gone, does anyone one know if available elsewhere. some of the websites under the name yorick were sponsored by talktalk have closed down. if permanent gone it is sad. how does one find out how many genealogical webspace have they closed down. Bill did ask for donation . a benefactor for this alarming trend is needed. American presidents with irish blood trusts eg The Mellons might consider grabbing for their reputation.
spelling in Co Rtyone noticed Eddy,Edie
spelling so far used Eadie
not knowing if everyone knows the Griffith Valuation ~1860ish use
http://www.askaboutireland.ie/griffith-valuation/. there are continuation sheets bringing the homesteads holders up to 1922 at PRONI
Eaddy James Church Street, Bangor Bangor Down
Edie Joseph Drumnascamph Clonduff Down
Edie Robert Moneyslane Drumgooland Down
Edie Mary Cromac Ballynafoy Ballynafoy Village Knockbreda Down Belfast
Edie John Ballyginny Maghera Down
Eaddy Catherine West Street,Newtownards Newtownards Down
Eady Robert Ballyskeagh, Low Newtownards Down
the irish census 1901 shows two of the Kircubbin Eadie were from Rureagh townland Inishargy civil parish . see Rowreagh in some records
good luck onwards to you all