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COSTOFSKI, BORIS was born 23 September 1907, received Social Security number 021-10-5561 (indicating Massachusetts) and, Death Master File says, died September 1977
Source: Death Master File (public domain). Check
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COSTOFSKI, ELLEN was born 17 February 1911, received Social Security number 012-09-2678 (indicating Massachusetts) and, Death Master File says, died April 1976
Source: Death Master File (public domain). Check
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COSTOFSKI, VINCENT was born 6 February 1909, received Social Security number 014-01-6316 (indicating Massachusetts) and, Death Master File says, died 12 March 1995
Source: Death Master File (public domain). Check
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