Here are a links to pages at a web site that has a searchable database on the Ireland Hearth Money Roles of 1663-65:
Co. Armagh:
http://www.failteromhat.com/armaghhearth.phpCo. Louth:
http://www.failteromhat.com/louthhearth.phpCo. Monaghan:
http://www.failteromhat.com/monaghanhearth.phpPay close attention to the search feature at the above site. You can use as little as 3 letters from a surname, and it will give you every entry with those 3 letters. That is very useful, as the spellings of the surnames varied quite a lot.
Mary Becker
Group Admin.
Oriel Project