I still think James McClure is a more likely candidate as father for Catherine. The John mentioned in blue italics below could have been her brother.
James McClure also leased property in the townlands of Cappancush West and Reacashlagh
Also a John Mara rented land in Cappanacush East in 1852 according to the tithe applotment books. I believe this may have been the father of my John Mara
also
marriage in Dublin, in Church of Ireland, of a John McClure, of Kenmare, Land Steward whose father was James, AND Sebilla Ellen Ferguson of Bessboro Parade, Dublin
Hi It would help the people who are searching immensely if you would let us know why you are thinking that James as the father is more likely than John for instance. Have you ancestor names of James for instance, since Catherine who are named James ie possibly harking back to a family name. Why do you believe that the families came from Cappanacush East?
As you are aware we have one large supposition to get over already and that is that the Church records are incorrect and the names have been switched.
Have you searched on the Sponsors names in the baptism register. The usual idea is that they are connected to the family. How do they fit in?
Any firmer details would be welcome ie the dates/maiden names and married for your grandmother & the marriage and death dates for Sara and Francesca. Do you recall having any great aunts and uncles (ie grandmother's siblings), if so what were their names.
To do a good job and be as helpful/useful as we can we often follow a practice of searching what you might think is old ground, as record sets change, more records are added. It is always best practice to look and check closer down the line to you.
The records in the US. have you any relations at all in the States? If so are you certain of how they got there?
If you have not searched the sponsors then I will do that. If you have are you able put up what you have found out.
Some BDM dates for twins and their children would be good too. We have the twins BDM.
I will also check Griffiths Valuation.