Hello Averil,

Only one immediately obvious to me:
"CORKIL William John Corkil/ Ann Kissage Parish Church 29 Jun 1781 married Elinor Hutchen"

If he was b.1781 he can't have married Ellinor Hutchen 30 Nov 1771.

After a very long search I have found some Corkill charts of CR's.
She has two William Cs b.1779 marrying Catherine Kelly - on both her Ballagorry and Ballasloe charts.
(Perhaps this is what has caused the confusion with the Ancestry people?)

Ballasloe Wm Corkill 1779-1832 son of James C & Bahee Lawson.
Ballagorry Wm Corkill 1779-1855 s/o John C & Jane Skillicorn.

At first I thought there must have been two Cath Kellys marrying William Corkills with no.1 marrying 10 May 1800, but no, second Cath is Cath Corkill, and her marriage wasn't until 25 Apr 1812.
There are William Corkill/Cath Corkill children's bapts in the 1830s but none that I can see early enough to be confused with Cath Kelly's.
(Perhaps in another parish?)

Bapts Maughold:
CORKILL Jane d/o William Corkill/ Catharine Kelly Parish Church 14 Sep 1800
CORKILL Catharine William Corkill/ Catharine Kelly Parish Church 19 Sep 1802
CORKILL Mary Ann William Corkill/ Catharine Kelly Parish Church 27 Jan 1805
CORKILL William William Corkill/ Catharine Kelly Parish Church 28 Jun 1807
CORKILL Robert William Corkill/ Catharine Kelly Parish Church 12 Nov 1811
CORKHILL John William Corkhill/ Catharine Kelly Parish Church 1 Jan 1815
CORKILL Matthew William Corkill/Cath Kelly 14 Jun 1818

CR was interested in Matthew b.1818, the only one other than a mysterious Cath b.1811 (not found) she gave to the Ballagorry William/Cath.
[She was wrong. Censuses show Cath b.1802 living with them as well as grandchildren - from Mary Anne and Jane. It is possible that the whole descent she has given from Robert b.1811 to grandchildren in Australia & Canada should be from the Ballagorry family.]

I think she chose William Ballasloe to marry Cath Kelly because of William CORKILL 73 Ballasloe, buried Maughold Feb 3 1878 whom she might have thought was William bapt 1807? She has father William Ballasloe dying 1832 and William Ballagorry dying 1855, and no death date(s) for wives Cath Kelly. And no wills.

I have Cath CORKILL aged 78, B.Gorrey, buried 18 Oct 1853. (Daur of Robert Kelly & Mary Kneale bapt Maug 11 Feb.1776?)
William CORKILL buried aged 77, B’Gorrey, 16 July 1855.

CR also has a second Ballasloe Wm Corkill d.1832 (b.1781 s/o John C & Ann Kissag).
There was only one:
Wm CORKILL 53 B'Sloe May 7 1833

I still think that Ballasloe Robert C. children's guardian brother William, and Wm & wife Elinr, in Robert's will is likely to be Elinor Christian.

By the way I got Joe Corkill's family muddled up with another one I was looking for at the same time. Joe's ancestors were not William Corkill & Cath Kelly, but William's brother Christopher Corkill 1787-1857 & Isabella Kermeen.

Sue