Thank you both,
I am not sure either way, McFadden, or Wallace, or something else completely different. These witnesses are probably not family members anyway if their siblings marriages are anything to go by.
I have just been searching my computer ( I suddently had a bright idea when reading my thread and your replies ) that maybe I had a transcription of the church marriage somewhere that I purchased from the Ulster foundation many years ago (ie not the civil record) that would give the witness names that they thought the church record reads of the witnesses , but sadly it seems I've not purchased that one from them, or at least I can't find it on my computer , I only have the civil
purchased from Groni, then later the free Irish Genealogy.
Kind regards