Hi Viv

A bit of speculation.

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From Donna’s MI:

MONA CAIN
died Feb 25th 1956
aged 74 years / daughter of the above / mother of Roy Cain

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From the burial index:

CAIN, Mona 28 Douglas Borough Cemetery 18 Dec 1912
CAIN, Mona 73 Rushen 21 Oct 1955
CAINE, Mona Mary 76 Douglas Borough Cemetery 22 Jul 1985

so no burial in February.

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A tree on Ancestry has Mona Mary Caine nee Conway (1909-18th July 1985), wife of John and Nellie’s son Robert Sidney Caine (9th May 1906-27th Nov 1983)

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Perhaps the Mona Cain in the MI was a daughter in law, married to one of John and Nellie’s other sons, and maybe she died off-island----and the age at death or the year of death was misread ?

Jean