Hello there, I searched Roots Ireland to no efffect in County Louth which is odd as this site about Louth has a lot of Addy hits, the one I focused on was the marreid womens cross index which refers to a Addy see Norris (more modern spelling) in Kildemock graveyard from the Journal of the County Louth History Society, however when I look over the journal online for 1953 I cannot see the reference mentioned, I will follow up with a friend who has the journal I think and will email the Secretary to see if he can shed some light on it, the site I mentioned is here and search Addy, http://jbhall.clahs.ie/index.html I am thinking the Addy person may be buried in a Norris plot.
I see two children baptised in the Church of Ireland in Drogheda in 1734 and 1741 a William Addy born to a Patrick Addy, and in 1741 an Elizabeth but the fathers name is given as Ann Addy, no other info and about 15 miles from Kildemock (there is a story about the Jumping Church of Kildemock if you wish to search)
I also see a reference to an Addy person on the Corporation of Drogehda so some community standing, you could also email the local history section of Louth Library. https://www.louthcoco.ie/en/services/library/genealogy-research-sources/ I understand that the local history section may not be open during COvind restrictions but it is possible they will take email queries.
Regards for now,