mcmillen /mcmullen or any variants

Shorty,

The church records in PRONI are not on-line. You need to go in person to look them up. If you are unable to go yourself, you could employ a researcher. Researchers in the PRONI area: http://sgni.net

There are 29 parishes in Armagh. Some have more than one church so potentially there’s about 40 sets of records.  However in reality it’ll be a bit less than that because a lot of early church records were destroyed in the 1922 fire in Dublin.  The chances of the relevant record having survived are perhaps 50:50.

https://www.ancestryireland.com/civil-parish-maps-for-ulster/civil-parishes-of-county-armagh/

This link explains what records exist, parish by parish:

https://www.nidirect.gov.uk/publications/proni-guide-church-records

John’s date of birth should be taken with a pinch of salt. In the 1800s people in Ireland didn’t celebrate birthdays and rarely knew when they were born or exactly how old they were. If officialdom later asked for a date of birth it was common to make one up. Plus baptism records are often just that, the date of baptism not the date of birth (which was often not recorded in the early 1800s). Baptism in the Church of Ireland can be anything from a few weeks to several years after birth. (Sometimes you see batch baptisms where 3 or 4 children from the same family were baptised together). So it is wise to check about 5 years either side of the reported date of birth.

I looked in Griffiths Valuation for 1864. There were 98 McMullen/McMullan/McMullin households in the county then so a fairly common name. In the 1901 census there were 11 people named John McMullen in County Armagh. The name would have been equally common when your ancestor was born. Ideally you need his parents names from a marriage or death certificate in Canada to be sure of identifying the correct family in Ireland.

 

 

 

 

Elwyn