Relationship Chart:
Maria Kellner and Martha Menken
Maria Kellner 
Birth 1 December 1865 -- Köln
Death 15 July 1944 (Age 78) -- Bonn
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Daughter
Martha Menken
Birth 20 October 1895  3729 -- Berlin
Death 15 May 1965 (Age 69) -- Remagen
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Martha Menken is the daughter of Maria Kellner.