Hi Phil,
Suggest that you can dismiss Templecorran.
['Tis extremely difficult to confuse one fricative, "hard C", with yet another, "T",
and especially with a soft dipthong "TH".]
In Co. Antrim in the late 18thC "TEMPLETOWN" was the designation of the seat of the UPTON family,
based at (what is known nowadays as) Templepatrick, owning many ofthe townlands within.
[As part of their promotion to the Peerage of Ireland in the pre-1801-union political shennanigans.
Originally, they had taken over Castle NORTON and renamed it Castle UPTON.]
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There is much confusion over the town's placename..
A conjecture (aka long-term myth) had it connected with a hospital of the the Knights' Templars.
This might explain an original town name designation - was it "Templars' Town" ?
[However, this is now firmly denied, in the notices on the approach to the old graveyard.]
The press frequently confused the family's place-name peerage title designation with the real surname "TEMPLETON".
The ("established, official") CoI church swapped its saint's dedication with Donegore during a parochial reorganisation in the 18th(?) century.
[i.e. St. Patrick moved to Temple "Patrick", and St. John moved to Donegore.]
The town was officially out of favour for a long time in the early 18thC, having been burnt to the ground following the alleged active involvement by many of its inhabitants during the 1798 rebellion.
Capt Jock