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Father: Isaaie (Isaiah) Decoste
Born: 1837, Canada
Marr: 1859
Died: 1901, Canada
Mother: Emilie (Amelia) Richard
Born: 1825, NovaScotia
Died: 1873, Nova Scotia
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 | Guillaume (William) Decoste 
Born: 27 OCT 1864 - Cape Auget, Richmond, Nova Scotia
Marr: -
Died: 9 JUL 1934 - Charlottetown, Queens, Prince Edward Island
Other Spouses:
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 | Adeline Blanchard 
Born: 1861 - New Brunswick
Died: 1 JAN 1950 - Charlottetown, Queens, Prince Edward Island
Other Spouses:
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 | 1. William Charles Decoste  Born: 2 NOV 1890 - Charlottetown, Queens, Prince Edward Island Marr: - Died: - |  | 2. Esther Ella Decoste  Born: 19 APR 1892 - Charlottetown, Queens, Prince Edward Island Marr: 1916 - Hartle Somers Died: 31 DEC 1964 - Charlottetown, Queens, Prince Edward Island |  |
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 | 3. John Joseph Decoste  Born: 7 JUL 1894 - Charlottetown, Queens, Prince Edward Island Marr: - Died: - |  | 4. Francis Alexander (Frank) Decoste  Born: 9 JUL 1895 - Charlottetown, Queens, Prince Edward Island Marr: 1916 - Lillian Mary Minnie Pool Died: 1950 - |  |
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 | 5. Arthur James Decoste  Born: 7 OCT 1897 - Charlottetown, Queens, Prince Edward Island Marr: 1921 - Gertrude Smith Died: 28 JUL 1960 - |  | 6. William Vincent Decoste  Born: 30 JUL 1899 - Charlottetown, Queens, Prince Edward Island Marr: 1923 - Muriel Pearl Vessey Died: 17 SEP 1965 - |  |
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 | 7. Isaac Guy Decoste  Born: 17 OCT 1902 - Charlottetown, Queens, Prince Edward Island Marr: 1930 - Alice LeClair Died: 2 DEC 1938 - Charlottetown, Queens, Prince Edward Island |  | 8. Frederick Charles Decoste  Born: 22 MAR 1905 - Charlottetown, Queens, Prince Edward Island Marr: 1938 - Adeline Elizabeth Cahill Died: 4 NOV 1989 - Charlottetown, Queens, Prince Edward Island |  |
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 | 9. Ambrose DeCoste  Born: JUN 1906 - Prince Edward Island Marr: 1930 - Winnifred Matilda Miller Died: 2 OCT 1935 - Charlottetown, Queens, Prince Edward Island |  |
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