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VONOSTHOFF, FREDERICK was born 14 May 1898, received Social Security number 438-40-4781 (indicating Louisiana) and, Death Master File says, died August 1971
Source: Death Master File (public domain). Check
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VONOSTHOFF, IRENE was born 1 August 1883, received Social Security number 077-16-6779 (indicating New York) and, Death Master File says, died March 1965
Source: Death Master File (public domain). Check
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VONOSTHOFF, SYLVIA was born 14 November 1903, received Social Security number 436-50-5219 (indicating Louisiana) and, Death Master File says, died June 1990
Source: Death Master File (public domain). Check
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