It would also help to know about when Terence and Rose born and what their sons' names were, as that could be a clue to the names of their fathers. There is one Terence Boylan in the Griffith's index for Co. Monaghan, in Monaghan parish. Too early to be your Terence, but could be grandfather or uncle. Assuming Terence and Rose were Catholic, you might ask someone to search for their baptisms in the Monaghan parish records in the NLI, which have been filmed back to 1835 but not by the LDS. Diane