Hi aghadowey,
Thanks for the information on Margaret Whittaker. It could be her as it is in the same area and I'm thinking Whittaker was not such a common name around those parts. It has thrown me that the son James states on his conversion to Catholicism in New Ross, Wexford, 13 Oct. 1876 that his father was Edmund Whittaker and his mother was Margaret McGuiness. The only other thing I have to go on is that Margaret's mother was potentially named Elizabeth and her father John as the family seemed to stick to the naming pattern for Rossendale Lancashire and I cannot find an Elizabeth or a John in Edmund's direct lineage yet those are names of their children.