McCallion - Tithes - 1826

So, great-grandfather James' has listed on his marriage cert that his father is Thomas. See here:

https://family-mccallion.blogspot.com/2021/04/james-mccallion-and-mary-hagney-hegarty.html 

But ... the only Thomas found in most of the records doesn't quite match up, especially the Thomas that marries Mary Patton. See here:

https://family-mccallion.blogspot.com/2022/04/thomas-mccallion.html

Paul doubts this Thomas (pun!) is correct: "Tradition in Ireland was that the first son was named after the father's father , the next son was named after the father, the third son was named after the mother's father and the same system applied to the female side. That is how our family was as my grandfather being the oldest was named John after his grandfather , James your grandfather was named after the father and Daniel was named after Daniel Hagney his maternal grandfather."

[Although we have seen this as an exception on the O'Grady side. Great grandfather Thomas does not name any children after his father Michael ... why?]

More from Paul: " About  the name Thomas I can only say  James had seven sons and not one was named Thomas. According to my Aunt Mary James was reared by an uncle at Tieroneil and that he originally was born in Co Tyrone. The earliest record I have is a John Mc Callion of Tieroneil paid Tithe Tax in 1826 I believe this is our GGGrandfather. James was 36 when he married Mary and she was a servant in his house prior to their marriage . Sometimes when doing family history you have to fill in the blanks as best you can and maybe John went by his second name could have been Thomas . Both your Grandfather and mine named their sons James and I would say your grandfather's second son Joseph was named after his brother who died as a child in 1895. "

The good thing here is that the tithe records of 1826 would now make sense! (I think I had posted it somewhere earlier).  I didn't know how John McCallion in 1826 would fit the picture, and why Thomas McCallion would NOT be present.

http://titheapplotmentbooks.nationalarchives.ie/reels/tab//004587422/004587422_00133.pdf

Now to find out more about gr-gr-grandfather John ...

Also, this means the Griffith's Evaluation makes sense! See earlier post:
https://family-mccallion.blogspot.com/2021/03/griffiths.html