Hi there,
a) When you were at St David's were you actively looking for
McGuire .... I'm noticing the first names of her parents, the use of the alias surname that is associated with McNally, and that the surname offered by the submitter starts with Mc (as in CC Mc N
I'm gently suggesting that perhaps you ought to contact the same place you got Thomas McNally's record, and ask them for similar pages for the 3rd & 4th quarters of 1823
....
Also, do remember please many lasses put their ages up so they could marry without seeking parental permission....
AND the information on death certificates is only as good as the then current knowledge of the person giving it. If the informant was a close family member, they were giving it at a time of grief, perhaps saying "I think ......" or "About .....". This happens even today, and the person (doctor/undertaker etc) recording the information is not responsible for checking the accuracy of the information they are given.
You believe Thomas Ransom was Thomas McNally's Dad .... so why not consider that there's a pointer for that 1823 baptism for Ann Mc ...., daughter of Thomas and Catherine .... Wiggy, you believe he fathered a son at age 77, why couldn't he father a daughter at 80 .... particularly , as you indicate, you can show that they had the same bedroom...
b) It may well be that the chap transported on the Fortune/Alexander, and emancipated in May 1811 got to where-ever the recruiting officers were for the 46th by 1813, and was one of the Shan-hai-ed enlistments, and thus returned to VDL .... (yes, recruiting officers did collect the odd new recruits from the pubs near their docked ship, yes, they sometimes clobbered them over the head, and errrr, yes, I have forebears in the Royal Navy, in this very time frame who may well have turned a blind eye when their ratings rounded up new recruits...
)
c) who were the witnesses for Ann's marriage, and also who were the witnesses for CCMc N's .... both married the brothers Stieglitz ...
d) have you started to look for the baptism of CC Mc N within that timeframe in the
West Indies ....
Cheers, JM