| Surname, Firstname | Birth | Death |
| DECOSTE, Adam Ian Cecil | 26 AUG 1995 | |
| DECOSTE, Adelaide | | |
| DECOSTE, Adele | | |
| DECOSTE, Agnes | 1894 | 1980 |
| DECOSTE, Agnes | | |
| DECOSTE, Agnes Amelia | 1912 | |
| DECOSTE, Agnes Elaine | 1920 | |
| DECOSTE, Albert | 1916 | |
| DECOSTE, Albert | 1892 | |
| DECOSTE, Albert Jeremiah | | |
| DECOSTE, Albert Jeremiah Jr. | 16 JUL 1956 | |
| DECOSTE, Albert L. | 1916 | |
| DECOSTE, Albert W. Jr. | 1 NOV 1942 | |
| DECOSTE, Albert William | 25 OCT 1916 | NOV 1978 |
| DECOSTE, Albert William Jeremiah | 11 OCT 1881 | 12 AUG 1945 |
| DECOSTE, Albert William Pierre | 2 JUN 1880 | 2 JUN 1880 |
| DECOSTE, Alexander | 1880 | |
| DECOSTE, Alexander | 1833 | 1919 |
| DECOSTE, Alexander | | |
| DECOSTE, Alexander | | |
| DECOSTE, Alexander | | |
| DECOSTE, Alexander Daniel | 1882 | |
| DECOSTE, Alfred | 1904 | |
| DECOSTE, Alfred | 1886 | |
| DECOSTE, Alice J. | MAR 1910 | |
| DECOSTE, Alison R. | 12 JAN 1977 | |
| DECOSTE, Alphonse | 1887 | 1895 |
| DECOSTE, Alphonsus | 1896 | 1927 |
| DECOSTE, Ambrose | | |
| DECOSTE, Ambrose Anthony | | |
| DECOSTE, Amelia | | |
| DECOSTE, Anastasia Marie | 1898 | |
| DECOSTE, Anastasie Sophia | 1873 | |
| DECOSTE, Andrew | 1899 | 1969 |
| DECOSTE, Andrew Vincent | MAR 1979 | |
| DECOSTE, Angela | | |
| DECOSTE, Angelique | | |
| DECOSTE, Angelique | 1892 | |
| DECOSTE, Angelique | 1854 | |
| DECOSTE, Angelique | | |
| DECOSTE, Angus William | 1916 | |
| DECOSTE, Anita | | |
| DECOSTE, Ann Marie | | |
| DECOSTE, Anna Agnes | 1912 | |
| DECOSTE, Anna Ethelbert | 1914 | 1942 |
| DECOSTE, Anna Margaret | 1936 | |
| DECOSTE, Anna Rita | | |
| DECOSTE, Anna Ruth | 18 NOV 1902 | 15 APR 1986 |
| DECOSTE, Anna Winifred | 15 JUN 1934 | |
| DECOSTE, Anne | 20 MAR 1850 | 1919 |
| DECOSTE, Anne | AUG 1878 | 1973 |
| DECOSTE, Anne | 1889 | |
| DECOSTE, Anne | | |
| DECOSTE, Anne Brigitte | 1874 | |
| DECOSTE, Anne Josephine | | |
| DECOSTE, Anne Virginie | 1906 | |
| DECOSTE, Annie | | |
| DECOSTE, Annie | SEP 1880 | |
| DECOSTE, Annie | 1903 | |
| DECOSTE, Annie J. | 1906 | |
| DECOSTE, Annie Josephine | 1874 | |
| DECOSTE, Anthony | 1907 | |
| DECOSTE, Anthony | | |
| DECOSTE, Anthony Francis Xavier | 1917 | 1991 |
| DECOSTE, Arnold Aloysius | 1940 | |
| DECOSTE, Arthur | 1893 | 1898 |
| DECOSTE, Arthur | | |
| DECOSTE, Arthur | 1894 | 1894 |
| DECOSTE, Arthur | 1897 | 1899 |
| DECOSTE, Arthur Henry | 21 JUL 1925 | |
| DECOSTE, Arthur J. | 1930 | |
| DECOSTE, Arthur T. | JAN 1881 | |
| DECOSTE, Arthur Timothee | 1881 | |
| DECOSTE, Augustin | 1890 | 1892 |
| DECOSTE, Augustin | 1895 | |
| DECOSTE, Barbara Elizabeth | 1945 | |
| DECOSTE, Beatrice Clare | 1904 | |
| DECOSTE, Beatrice Leona | | |
| DECOSTE, Benjamin | 1847 | 1904 |
| DECOSTE, Benjamin | AUG 1876 | |
| DECOSTE, Benjamin | 6 JUL 1853 | |
| DECOSTE, Benjamin | 1 JUN 1814 | 9 MAR 1904 |
| DECOSTE, Benjamin | 1855 | |
| DECOSTE, Benjamin | 1882 | |
| DECOSTE, Benjamin | | |
| DECOSTE, Benjamin | | |
| DECOSTE, Benjamin Ambrose | 1920 | |
| DECOSTE, Benjamin Augustin | 1888 | 1918 |
| DECOSTE, Benjamin Hubert | 1908 | 1927 |
| DECOSTE, Benjamin Pascal | 1901 | 1993 |
| DECOSTE, Berchmans | 1944 | |
| DECOSTE, Bernadette | 1921 | |
| DECOSTE, Bernadette | 1914 | |
| DECOSTE, Bernadette | 1891 | |
| DECOSTE, Bernadette Paul | | |
| DECOSTE, Bernard | | |
| DECOSTE, Bernard Alphonsus | 1909 | 1933 |
| DECOSTE, Bernard Benedict | 1915 | |
| DECOSTE, Bernard Charles | | |
| DECOSTE, Bernard Gary | | |
| DECOSTE, Bernard Keith | | |
| DECOSTE, Bertha | 17 DEC 1925 | |
| DECOSTE, Bertha Elizabeth | 1908 | |
| DECOSTE, Bertha Mary | 1917 | 1983 |
| DECOSTE, Bertram Aloysius | 1921 | 1922 |
| DECOSTE, Berverly Joan | 1954 | |
| DECOSTE, Beth Anne | | |
| DECOSTE, Beth Jane | 13 FEB 1995 | |
| DECOSTE, Betty | 12 NOV 1958 | |
| DECOSTE, Beverly Ann | | |
| DECOSTE, Brian Vincent | ABT 1963 | |
| DECOSTE, Brigitte | 3 AUG 1865 | |
| DECOSTE, Cameron | 17 OCT 1995 | |
| DECOSTE, Cara | | |
| DECOSTE, Carl Allister | 1946 | |
| DECOSTE, Carl Ross | | |
| DECOSTE, Carol | 1 OCT 1948 | |
| DECOSTE, Caroline | 1864 | |
| DECOSTE, Caroline Marie | 1948 | |
| DECOSTE, Catherine | 1874 | 25 FEB 1874 |
| DECOSTE, Catherine | 1854 | 1938 |
| DECOSTE, Catherine | 1850 | |
| DECOSTE, Catherine Elizabeth | 1945 | |
| DECOSTE, Catherine Jane | | |
| DECOSTE, Catherine L. | 1958 | |
| DECOSTE, Catherine Philomene | 1903 | |
| DECOSTE, Catherine Sophie | 1889 | |
| DECOSTE, Cecelia | | |
| DECOSTE, Cecilia Emmanuella | 1917 | |
| DECOSTE, Cecilia Gertrude | 1906 | |
| DECOSTE, Celeste | 20 MAR 1850 | |
| DECOSTE, Charity | 19 JUL 1976 | |
| DECOSTE, Charles | 1 JUL 1936 | 10 MAR 1993 |
| DECOSTE, Charles | | |
| DECOSTE, Charles | 1880 | 1967 |
| DECOSTE, Charles | 1906 | |
| DECOSTE, Charles | 1865 | |
| DECOSTE, Charles | | |
| DECOSTE, Charles Alphonsus | 1924 | |
| DECOSTE, Charles Augustus | 25 MAY 1909 | 1989 |
| DECOSTE, Charles Edward | 12 MAY 1879 | |
| DECOSTE, Charles Edward | 30 SEP 1884 | |
| DECOSTE, Charles Edward | 7 MAR 1888 | |
| DECOSTE, Charles F. | 11 APR 1904 | |
| DECOSTE, Charles Frederick | 1879 | 1944 |
| DECOSTE, Charles Henry | 1952 | |
| DECOSTE, Charles Victor | 1919 | |
| DECOSTE, Charlotte | 1855 | |
| DECOSTE, Charlotte | 1884 | |
| DECOSTE, Charlotte | 3 JAN 1882 | |
| DECOSTE, Charlotte Mabel | 1904 | |
| DECOSTE, Cheryl Ann | 26 OCT 1958 | |
| DECOSTE, Christina | 1910 | |
| DECOSTE, Christina Pamela | | |
| DECOSTE, Clara Isabella | 1902 | |
| DECOSTE, Clarence | | |
| DECOSTE, Clarence Alex | 1915 | 1930 |
| DECOSTE, Clarence Gerard | 1928 | |
| DECOSTE, Clifford Jr. | | |
| DECOSTE, Cloe | 23 FEB 1992 | |
| DECOSTE, Coleen | | |
| DECOSTE, Colin Ignatius | 1950 | |
| DECOSTE, Curtis Anthony | 1941 | |
| DECOSTE, Cyril Urbin | 1917 | 1986 |
| DECOSTE, Dale Philip | 1960 | |
| DECOSTE, Damian Paul | 1921 | |
| DECOSTE, Daniel | 1853 | 1905 |
| DECOSTE, Daniel Joseph | 1896 | |
| DECOSTE, David | 21 AUG 1965 | |
| DECOSTE, David | 5 MAR 1990 | |
| DECOSTE, David | 20 JAN 1841 | 1884 |
| DECOSTE, David | MAY 1880 | |
| DECOSTE, David | 1912 | 1985 |
| DECOSTE, David | | |
| DECOSTE, David | | |
| DECOSTE, David | 1842 | 1912 |
| DECOSTE, David | | |
| DECOSTE, David | | |
| DECOSTE, David Anthony | 1917 | |
| DECOSTE, David Christopher | 1920 | |
| DECOSTE, David Donald | | |
| DECOSTE, David Francis | 1912 | 1989 |
| DECOSTE, David M. | 17 OCT 1968 | |
| DECOSTE, David Mark | 4 JUN 1872 | |
| DECOSTE, David Michael | 1899 | |
| DECOSTE, David Raphael | APR 1866 | |
| DECOSTE, Dawn Marie | 19 FEB 1984 | |
| DECOSTE, Deborah | 21 JUL 1957 | |
| DECOSTE, Deborah A. | 14 OCT 1965 | |
| DECOSTE, Della Marie | 1932 | 1992 |
| DECOSTE, Denise | 3 SEP 1954 | |
| DECOSTE, Dennis | 25 MAY 1953 | |
| DECOSTE, Dennis Michael | | 1994 |
| DECOSTE, Desire Charles | 1906 | |
| DECOSTE, Devine | | |
| DECOSTE, Devon | 23 JUN 1984 | |
| DECOSTE, Diane Marie | 13 JUN 1949 | |
| DECOSTE, Dianne Marie | | |
| DECOSTE, Divine | 28 FEB 1851 | |
| DECOSTE, Donald Henry | 1943 | |
| DECOSTE, Donald Louis | 11 JAN 1927 | |
| DECOSTE, Donald Louis III | 30 JAN 1970 | |
| DECOSTE, Donald Louis Jr. | 11 JAN 1947 | |
| DECOSTE, Donalda | | |
| DECOSTE, Donna Darlene | | |
| DECOSTE, Donna Darlene | | |
| DECOSTE, Dorothy M. | 1920 | |
| DECOSTE, Edith | | |
| DECOSTE, Edith | | |
| DECOSTE, Edmund | 1868 | 1959 |
| DECOSTE, Edmund Wilfred | | |
| DECOSTE, Edouard | 1842 | 1876 |
| DECOSTE, Edourad Peter | 1871 | |
| DECOSTE, Edward | 1897 | |
| DECOSTE, Edward | 8 MAY 1862 | |
| DECOSTE, Edward | | |
| DECOSTE, Edward | 1851 | 4 APR 1876 |
| DECOSTE, Edward | | |
| DECOSTE, Edward Bonaventure | 14 JUL 1901 | AFT 1943 |
| DECOSTE, Edward H. | | |
| DECOSTE, Edwin | 1876 | 1956 |
| DECOSTE, Edwin | 1924 | |
| DECOSTE, Edwin | APR 1929 | |
| DECOSTE, Eileen Agatha | 1930 | |
| DECOSTE, Eldora Angelique | 1906 | |
| DECOSTE, Eleanor Kane | 5 MAY 1927 | |
| DECOSTE, Elias Preston | 1917 | 1976 |
| DECOSTE, Elie Henry | 1869 | |
| DECOSTE, Elieas | 1838 | |
| DECOSTE, Elise | 1866 | |
| DECOSTE, Elizabeth | 12 SEP 1857 | |
| DECOSTE, Elizabeth | 1873 | |
| DECOSTE, Elizabeth | 1878 | |
| DECOSTE, Elizabeth | 3 JAN 1882 | |
| DECOSTE, Elizabeth | ABT 1887 | |
| DECOSTE, Elizabeth | 1858 | |
| DECOSTE, Elizabeth | | |
| DECOSTE, Elizabeth | 1858 | |
| DECOSTE, Elizabeth | 1861 | |
| DECOSTE, Elizabeth | | |
| DECOSTE, Elizabeth Ann I | 17 JUN 1869 | 1875 |
| DECOSTE, Elizabeth Ann II | 25 JUN 1875 | 1950 |
| DECOSTE, Elizabeth Clara | 1905 | |
| DECOSTE, Elizabeth Emma | 1882 | |
| DECOSTE, Elizabeth Margaret | 1886 | AFT 1970 |
| DECOSTE, Elizabeth Marie | | |
| DECOSTE, Elizabeth Rose | 1905 | 1970 |
| DECOSTE, Ella | | |
| DECOSTE, Ellen | 1852 | |
| DECOSTE, Elmer Andrew | 1924 | 11 DEC 1995 |
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