Just by googling you should be able to find pictures of some parish churches. Kinnegad, Coralstown and Clonard are
on the website www.kinnegadparish.ie
(has pictures & history)
RC parish registers can be accessed through an Irish History Foundation, it is a pay website from .10E + and prior to 1864 there are no certificates but a record contains mother, father and mother's maiden name, dates, parish and sometimes witnesses.
There are other markers and two are now used as census substitutes.www.genealogy.nationalarchives.ie
Tithe's 1820-1839 a valuation for taxeswww.askaboutireland.ie
has free Griffith Valuation records, will give names living in parish's at the time of the GV,
property description, landlord and neighbours.www.census.nationalarchives.ie
There are 5 Bruton's in the telephone book for Westmeath, addresses sufficient for mail delivery no postal codes required. 3 Cully, 5 Graham, 33 Cunningham, 20 Riley,
many Kelly's. You can match up your place names. Also if you get the Civil Registration District or Poor Law UNION which would be the closest large town but no more than 12 mi. distance. In this case Mullingar is the closest to the Civil Parish of Killucan where Kinnegad is located.