Hi Bonnie,

It is not easy to be sure which is the correct link. See below the results of a search I made on-line at the LDS site

You searched for: Catherine Cubbon [refine search]
Birth/Christening, 1763 - 1773
Exact Spelling: Off
Matches: All Sources - 8
International Genealogical Index - British Isles
1. Kath CUBON - International Genealogical Index / BI
Gender: F Christening: 12 Feb 1764 Braddan, Isle Of Man, England
Parents:- Wm Cubon & Margt Brew

2. Catherine CUBBON - International Genealogical Index / BI
Gender: F Birth: Abt. 1766 Of Kirk Bradden, Isle Of Man, England
Spouse:- William Quayle.

3. Cath CUBON - International Genealogical Index / BI
Gender: F Christening: 2 Feb 1768 Arbory, Isle Of Man, England

4. Catherine CUBON - International Genealogical Index / BI
Gender: F Christening: 6 Oct 1771 Braddan, Isle Of Man, England
Parents:- Wm Cubon & Cath Gellin

5. Cath CUBON - International Genealogical Index / BI
Gender: F Christening: 18 Oct 1772 Arbory, Isle Of Man, England

6. Catharine CUBBON - International Genealogical Index / BI
Gender: F Birth: Abt. 1773 Of Kirk German, Isle Of Man, England

7. Catharine CUBBON - International Genealogical Index / BI
Gender: F Christening: 9 May 1773 Malew, Isle Of Man, England

I think we just need to concern ourselves with numbers 1,2 and 4 above. entries 2 and 4 could I think refer to the same person with the christening on the 6th Oct being a late babtism. The abt birth for 1766 is not from the parish registers but from a `sealing` for the dead in the Morman church and this information has been submitted. It would be useful therefore to actually see the Marriage entry for William Quayle and Catherine Cubbon in the Braddan Marriage registers. I suspect that it may say that Catherine was member of the Parish and that William was from the Parish of Marown. This could explain why they were keen for their children Philip and Catherine to be babtised in both Churches.
However I can see why you opt for the Catherine born in 1764 as being your ancestor if her age in the 1851 census is correct plus the possible Brew connection. I assume that the census you refer to is for the Parish of Marown. Is this correct and what is the age of Catherine Quayle Brew in this census? We could do with finding a death and possible MI for Catherine Quayle nee Cubbon and it might be worth checking for her and possibly William in the 1841 census.
I need to do a lot of work on my Quayle line and really I find it best to do the research on the Island. I might find time this summer but I can`t be certain. I see on Brian Lawson`s site, in the Will index there is a will for a Catherine Quayle of Malew parish dated 1861 Ref A39 film Nos:- 0106263.
Look forward to your comments on the above.
Colin