Family: Frank Costello / Grace M. Blacklock (F508)
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Walter Blacklock (1854-1917)
|
Mary Gormley (1859-1935) |
| Frank Costello (1880- ) |
| Grace M. Blacklock (1882- )
|
Mary Frances Costello (1904-1987)  |
| Leland Costello (1907- ) |
| Robert W. Costello (1913-1997) |
| John Costello (1916- ) |