Dear Hallmark, thank you very much for all the trouble you have gone to on my behalf. I think we might have been at cross purposes. My original enquiry was about my greatgrandfather William Frewens parents - William and Lucy Frewen, as I have traced the children of William & Maria (Bishop) Frewen
I found the original PARISH marriage register on the Church Records of Irish Genealogy for the wedding of their son William (my greatgrandfather) to Maria Bishop. This register was the only reference I have found anywhere in my searches for William's (my ggf) parents - William and Lucy. It is this couple I am now trying to trace. I think your link was to the CIVIL marriage cert which does indeed state that William's father was deceased at the time of the marriage.