Lois - the links with Ireland, especially from Patrick, Peel + west of Island are very strong around late 17th + early 18th C - remember that Manx and Irish Gaelic are related (tho now for historical reason have very different orthographies) thus compared with England there would be less of a language barrier. The Island was very poor until the real money from the Running Trade started to flow during the 1720's onwards thus many landless sons would go to Ireland to seek their fortune - also it appears that many daughters went into service there - there was thus an interchange of families as possibly Manx daughters 'dragged' their Irish husbands back to the Island, likewide Irish brides found themselves on the Island - once the the running trade took off then the flow was reversed - many Irish came over with an eye to getting rich (as as this was possibly at expense of the English Crown I suspect even more enjoyable). DNA tests might indicate some of this flow - tho as Avril points out the published DNA sequences place the ancestors of the Patrick Cain in the Celtic rather than the Viking group thus hinting at an Irish root. The name Cain might well have different derivations in Man and in Ireland - Moore and to a greater extent Kneen in their studies possibly overemphasised the Irish derivations - there might well be other derivations with the Manx Cains being rooted in the Norse colonies in the 'out Isles'

I had started on looking at property transactions in Michael when the query re the supposed Cain-Corlet marriage arose - I'd already looked at marriages in this period and couldn't find any Adam Cain - Corlett marriage tho I was searching for the Cain baptism of the heir to Ballamanaugh (Orrisdale) and jumped in too quickly not realising that there was another Adam Cain in Ballaugh (tho I did comment in my original post that there was a nagging doubt in that the burials of the children were in the 'wrong' parish) - I've now got a reasonably good hand on the various deeds, mortgages + lib vas entries as well as the wills and parish regs but pushing back into mid 17th C is quite hard going as record keeping was not always good, registers lost or not even kept and most early wills contain little information unless linked in with other records to give a more complete picture