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Father: Guillaume (William) Decoste
Born: 1864, NovaScotia
Marr:
Died: 1934, Prince Edward Island
Mother: Adeline Blanchard
Born: 1861
Died: 1950, Prince Edward Island
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 | Isaac Guy Decoste 
Born: 17 OCT 1902 - Charlottetown, Queens, Prince Edward Island
Marr: 14 JAN 1930 - Charlottetown, Queens, Prince Edward Island
Died: 2 DEC 1938 - Charlottetown, Queens, Prince Edward Island
Other Spouses:
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 | Alice LeClair 
Born: 10 APR 1909 - Rusticoville, Prince Edward Island, CANADA
Died: 24 MAY 1990 - Charlottetown, Queens, Prince Edward Island
Other Spouses:
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 | 1. Joan Decost Born: 7 MAY 1933 - Marr: - Died: 7 MAY 2007 - Charlottetown, Queens, Prince Edward Island |  | 2. Joyce Mary Decoste  Born: 20 SEP 1932 - Charlottetown, Queens, Prince Edward Island Marr: - Donald James Edwards Died: 5 APR 2013 - Smiths Falls, Lanark, Ontario |  |
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 | 3. Julia (Bobbie) Decoste Born: - Marr: - Died: BEF 2013 - |  |
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