I have now seen the documents Raymond was sent by a relative, put together in 1991 by an IoM professional researcher.

There is a 30 March 1752 marriage contract between “John Quayle of Creg -Voar in the parish of Christ Lezaire for and in behalf of himself upon the one part - and Thomas Quayle of the Nass-Choan in the parish of Ballaugh and Mary Quayle alias Crye his wife for and in behalf of Catherine Quayle their daughter upon the other part…”
Thomas and Mary agree to settle half their house, land, corn, farming equipment, etc., woollen webbs, yarn and thread on the young couple in return for their looking after the Thomas & Mary during the “old couple's” lifetime, and inherit the rest on the death of the longest liver of them.
“John Quayle of Lez Ayre & Cath Quayle of B’Lough” married in Ballaugh on Apr 5 1752.
The researcher said she was of “Ballalough in Ballaugh” but that she was unable to trace the farm name – possibly Bollagh the name for the old road through the Curraghs.

Children of Thomas Quayle & Mary Crye were:
Thomas bapt 4 Oct.1710, residence Nascoin
Elinor bapt 24 Feb.1711/12 marr John CALEY 1738 at Lezayre
William bapt 3 Aug 1715
Mary bapt 26 Sept 1718 marr Robt KILLIP 1739 at Ballaugh
Margt (no bapt) marr Wm MOORE (not recorded)
Ann (no bapt) unmarr in 1768
Cath bapt 26 Dec 1723 marr John QUAYLE 1752 at Ballaugh

I am mystified as to how a younger daughter Catherine could have been given land under a marriage contract, unless the eldest son had already inherited the main family farm, and the parents had moved to a possibly smaller house and land bought during their marriage. There are probably also marriage contracts for all the older children, excepting unmarried Ann who was the only one who inherited in both parents’ wills, apart from 6d.

Thomas Quayle of Ballaugh died 12 March 1756 (will) and wife Mary was buried 6 April 1768 Ballaugh (will).

Because Cath’s husband John Quayle of Lezayre agreed to the marriage contract on his own behalf, rather than the usual parents being named, I would expect him to be considerably older than Catherine, and self-supporting.
The researcher wrote that his parents would have been dead.

There were at least 6 John Quayles bapt Lezayre who could have been this John.
The researcher looked at about 7 wills for the fathers’ names who had died before 1752 without finding any reference to Creg –Voar, or being able to identify which John married Cath Quayle.

The children of John Quayle & Catherine Quayle were:
Thomas bapt: 11 Mar 1753 Ballaugh
Ellin bapt: 19 Aug 1754 Ballaugh marr 1785 Ewan CORLETT
John bapt: 3 Aug 1756 Ballaugh
Patrick bapt: 19 Apr 1761 Ballaugh marr Anne KEWLEY
Philip bapt: 14 Oct 1764 Ballaugh moved to Maughold, and marr Isabel KERMEEN 1806?
Variations of the farm name Nascoin was given at their baptisms.

Catherine Quayle, Nias Choan, was buried Ballaugh 14 Dec 1794 (will). I have seen only the petition of Patrick Quayle, the executor of the will of his mother Catharine Quayle, where the Court in Bride orders interested parties to come to the next session. Dated 20 Dec 1794. Besides Patrick, the interested parties were John Quayle, Phillip Quayle, Elinor Corlett als Quayle, James Cretney (witness). Dated 6 Jan 1795. The next page requires Wm Quayle and Wm Quayle to appear in Bride to answer the suit of Patrick Quayle. 5 Jan 1795.
I can’t see where the two Williams fit in, unless he was uncle William b.1715, and his son.

John Quayle, Asch choan, Ballaugh, bur. Nov 1 1789 (will – not seen – but your summary has “fa John's will 1789 d oct;son patk,philip,john,wm [?bapt];wife cath execx).

Being bapt in 1764 doesn’t fit with the ages given for the Philip Quayle in Maughold who was b.c.1769. However it is quite possible that he docked a few years off his age to marry a younger woman, because if born in 1764 he was aged 41 at his marriage, and Isabella was only 28. He might have thought it sounded better to be in his 30s than his 40s. But if so this means that he was even older at his death - 93!
All the Maughold records for this couple were given on the board in 2006.

The researcher says that after looking at the three possibilities to be Philip of Ballaugh who married in Maughold she thinks that John & Cath Quayle are the most likely parents for him, but that from a genealogical point of view it is impossible to be certain unless a supporting document can be found referring to Ballaugh Philip as residing in Maughold.
My suggestion would be to search for his siblings' wills, and especially a decree if one of them died young where it would be usual to name the next of kin as supervisors to underage children.
This is a possibility to be the eldest son Thomas's will: QUAYLE, Thomas 1790-1 Bal E w 0106402
Perhaps you wouldn’t mind having a look at it next time in Peel?

Sue