Timeline Chart

Female  Bertha JacobaHelderman
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Male  FrederikHelderman
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unknown  JacobHelderman
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Female  Marijtje JacobaHelderman
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unknown  RoelofHelderman
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Female  ZwaantjeHelderman
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Birth -- 27 July 1913 28 22 Alkmaar
Birth -- 27 February 1915 30 24 Alkmaar
Birth -- 4 April 1917 32 26 Alkmaar
Birth -- 12 January 1920 35 28 Alkmaar
Birth -- 6 January 1922 37 30 Alkmaar
Birth -- 19 April 1923 38 32 Alkmaar
Death -- 1 April 1986 ‎(Age 72)‎ Alkmaar
Death -- 9 August 1987 ‎(Age 72)‎ Alkmaar
Family as a Child -- 8 January 2007 ‎(19 years after death)‎ @F1086@
Family as a Child -- 8 January 2007 ‎(20 years after death)‎ @F1086@
Family as a Child -- 8 January 2007 ‎(Age 89)‎ @F1086@
Family as a Child -- 8 January 2007 ‎(Age 83)‎ @F1086@
Family as a Child -- 8 January 2007 ‎(Age 85)‎ @F1086@
Family as a Child -- 8 January 2007 ‎(Age 86)‎ @F1086@