Died England, possibly buried Isle of Man

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I am searching for the burial place of the following two people who both died Grange Cottages, Ince Blundell, West Lancashire, and wondered how I could find whether they were buried in Isle of Man.
Hannah Maria Parsons nee Corrin, died 7/12/1921 - born 1868.
her brother -
Thomas Corrin died 10 April 1924, born 1850.
both born Malew.
Any help gratefully received.

[KGarrad]

Nothing in Malew?
Nothing in Douglas Borough Cemetery either.
Nothing in Arbory.
Nothing in Malew, St Marks.
And nothing in Rushen.

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KGarrad,
 Thank you so much for looking on my behalf.
Over here I have looked at about 5 possible burial sites to no avail.
G.