Hi,
I have been looking to see if I can help.
First of all Shaw and Elizabeth had
James 1848 this is the James the farm was left to.
Jane 1851
Sarah 1856
Rachel 1864
Ellen 1868
also in the 1901 census there was Anne and Elizabeth sisters of the James you mentioned, he was the head of the household.
Checking on these two, 2 births for Elizabeth, father listed as Hugh in one and Thomas in another.
Anne must have been a second name to one of the above.
So then I went to the marriages.
Hugh Agnew
Thomas Agnew
John Agnew
these are all from Kilteel, married around the same time 1841 to 1849.
These also had children using the same names as Shaw and Elizabeth.
I went to the Tithe records the only Agnew's were in County's Armagh, Monaghan and Roscommon, this was 1823 to 1837.
Later on this year records are being released on line of Parish Books, these from the National Library in Dublin, they are on reels, as I have spent many hours searching them, these will help you with your searching.
The only other thing to do is to contact the Church in Kilteel.
I hope this has helped.
Maggsie