Hi Elizabeth
Despite the fact that Robert Casements wills (two of them) are filed in Lonan, the references suggest that he lived in Lezayre. I have not found a birth of a Robert that would seem to line up with his marriage in 1724 to Alice Garrett. If you check my Wills page under Casement, you will find both Rob. Casement wills, decrees for 1738, and a "Male" Casement for 1727. I believe that this male is Robert Casement from the Grange. Unfortunatley it does not provide any family details in specifics except for the mention of the Grange.