Hi Tony
I am the Parish Liaison for Kilcolman, Co Offaly and apologies for not replying sooner. I have only just seen your message due to technicalities.
I have found some birth records for Carrolls in the Kilcolman register that may be your family but I would need some more information from you to check that I am on the right track. Carroll is a very prominent name in this Parish which makes it a little bit more difficult! In fact my own mother was a Carroll so I will be able to rule out some of them straight away. Was your great grandmother called Mary Newson? As I have a record of a Patrick born to her and James plus 2 sisters, one of them may be your grandmother. So if you would find it easier to email you can do so to the parish email address kilcolmanoffaly@irelandxo.com. I would also love if you could scan a copy of the letter sent by your great grandparents to your Grandmother as I may recognise more local information from it and connections. If it is personal no problem.
Looking forward to being of help.
Margaret Hensey