Found John Cain's parents - Daniel Cain + Margt Stole m Braddan 17560120
Margt d in 1760 - will d 25 jul 1760;sis alice,mary;son john(house when he reaches 16) - uncle + aunt patk kermod + alice stole supv;husb dan exor;
John was only child bapt Bra 17570123
Danl remarried twice - will 1794 -made 17 dec 1793;eldest son danl;5 ch john,thos,wm,isabel + elinr;wife elinr als christian execx - m Ellinor Onc 17760720
prev wife was Isable Bridson m Bra 17600920 - ch Wm + Thos
confirmed by SSS Oct 1787 66 - [Douglas - Ballakermeen]dated 1 Apr 1785;John Cain + wife Margret als Cannell sell for £8 8s(Brit) to father Daniel cain our title to half of father's dwelling house + garden on sandside (part of Ballakermeen) adj Thomas Cannell on south, John Stowell on west, Edward Callow on north + street on east - rent 0.25d; Witt John Corkill, John Kissack
this property on today's Strand Street was that sold in 1756 (SSS Oct 1757 53) [Douglas - sandside]dated 3 Nov 1756;John Finch(Douglas) sells for £4 10s to Daniel Cain(Douglas) a plot on sandside 7yrds in length + 15yrds in breadth adj Robt Calow on north, street on east, John Finch's own rent on south + west - part of BallaCyrmeen; Witt Robt Kelly x. John Stole; Setting quest place 0.25d
Daniel's mother was Isable Cain d 1795 - dated 11 jan 1794;widow;gson danl caine;gch isabel,john,elenr,thos + wm caine;niece mary cowley;dau in law elinor caine als christian widow;gsons john + robt clage;son thos,danl(late decd);dau margt clague(w/o john);only son [tlost in binding]exor;note son thos late decd codicil (his will Thomas Kane[cain] 1794 - douglas;niece eleanor kane;sister clague's daughters [?margt cain w/o john clague];names ann callister;bro john kane
I think she was possibly Isabel Cain als Cain (noted of Santan) who married John Cain Bra 17270523

I also now have will of John Cain (very much as described in deed by son Wm)
and much more inbteresting the 1844 will of Margt Roney als Cain als Cannell - she was a fairly rich lady from her 2nd husband - named grandchild etc - will was a trust deed

there is a MI in Rushen to John Cain (bady worn it seems that has lost death date but also has a MI to Margt Roney (? if she is buried with 1st or 2nd husb) so def Margts 1st husb
- the IoMFHSoc read age of John as 16 but this should IMO be 46 (d young like his sons) which fits in with above
The inquest into his death a 1 page doc #18 in 1803 enquest file just noted that from the jury's own knowledge insanity was cause of death (body washed up but possible had throuwn himself onto rocks)