Patrick,
No easy way of finding the family if no townland was given for the baptism. If the family were farmers then they should be listed in the 1825 tithe applotment records. Unfortunately Murray is a very common surname in that parish and there were around 25 Murray farms:
https://www.irishgenealogyhub.com/armagh/tithe-applotments/derrynoose-parish.php
Ronaghan was almost equally common as you will see.
If the family were labourers then they are harder to trace as they tended to move to follow available work and show up in fewer records.
Any idea when Thomas and Ann died?
Griffiths Valuation (1864) lists 2 Thomas Murrays, both farmers, in Derrynoose. One lived in Doohat (also known as Crossreagh) and the other in Crossbane. Both had 10/11 acre farms. The Doohat Thomas died in 1886 and probably isn’t old enough.
https://civilrecords.irishgenealogy.ie/churchrecords/images/deaths_returns/deaths_1886/06252/4790292.pdf
The Crossbane Thomas was even younger though he had a wife named Nancy (which is an alternative name for Ann).
https://civilrecords.irishgenealogy.ie/churchrecords/images/deaths_returns/deaths_1884/06339/4817756.pdf
If either died before 1864 (when death registration started) they will be difficult to trace. Most RC parishes didn’t keep burial records. and so unless there was a gravestone, there might be no record.
