The 1796 Flax Bounty lists a John Williamson residing in Killeevan Parish. Are you able to determine if there is any other information about this John Williamson who just might be the father of Thomas and Oliver.
Hi Bruce,
I checked subscription sites - www.rootsireland.ie and www.findmypast.ie but did not find any record for Thomas and Oliver Williamson with a father named John, in Killeevan parish.
The Tithe Records - 1823 to 1837 have a number of persons named "John Williamson". 1825 - 1833. They can be accessed at www.nationalarchives.ie - Tithe Records - County Monaghan. The name is in various parts of the country.
Regards,
Thank you for your efforts on my behalf. Bruce