Family: John Leroy Blackstone / Mildred Eugenia Zwick (F25904)
m. 31 Jan 1933Clark Otis Blackstone (1874-1942) |
Mary Margaret Heil (1884-1959) 
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Marilla Catherine Blackstone (1902-1988)  |
| Anna Pauline Blackstone (1904-1966) |
| Wilber Francis Blackstone (1906- ) |
| Paul Leo Blackstone (1919-1998) |
| Joseph Frank Zwick (1883-1976)
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| Ida Mary Dick (1891-1913)
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| Leander George Zwick (1909-2000) |
| Mildred Eugenia Zwick (1913-1996)
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| John Leroy Blackstone (1908-1975)
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| Virgil Joseph Blackstone (1938-1938) |
| Darlene Regina Blackstone (1939-1993) |