Ok, so the “parts”, literally the people who are party to this deed, indicating their separate involvement in whatever transaction is taking place.
In the first one, we have James Barry, a farmer from Killmacow in Limerick, his sister, Ellen Barry, and someone else called Edward Barry. He is probably more distantly related than the siblings.
The second one mentions a Martin Barry, brother of James Barry, a farmer from Killmacow again.
You haven’t included the date on the first memorial but I would presume these two James are the same person, unless the years are very different.
So we probably have 3 siblings and perhaps a cousin. You’ll need to look at other records to help iron that out.