Family: John Mervyn BLACKWELL, Jr. / Shirley MARTIN (F22921023)
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 | John Henry BLACKWELL (1894-1949)
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 | Gladys Minerva O'BRIEN (1897-1988)
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| Everet Jeffrey BLACKWELL (1922-1995)  |
| John Mervyn BLACKWELL, Jr. (1925-2000)
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| Shirley MARTIN (1927-1991) |