Elwin was born on 15/11/1893 in Curra Creek, Wellington NSW.
He married to Jessica Ann McDonald in 1932 in North Sydney. Jessica was born in Mummel NSW on 18/07/1906.
They had the following children:
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Augustus Ian McDonald Cork (1932 – 1980)
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Ross Elwin Cork (1934 – )
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Bruce Alan Cork (1936 – )
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Janice Margaret Ann Cork (1941 – )

Sydney morning Herald 28/07/1999
Elwin died on 20/08/1969 in Beacon Hill.
Jessica died in Mona Vale on 27/07/1999.