Timeline: Frederick John Zwierlein: Our Family History

UPDATED: 25 July 2026

Frederick John Zwierlein

1913 - 1980 (66 years)

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Timeline

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Ambrose Heier (1875 - )

Barbara Saffran (1857 - 1925)

Catherine Kelley (1894 - )

Carolina Theresa Lefrois (1879 - 1959)

Roman Darrer (1888 - 1908)

Katherine Grasberger (1874 - )

George Wendel Heim (1868 - )

Frederick Forest (1883 - )