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Civil Marriage 13 January 1853 (Age 27) -- Den Helder, Noord-Holland, Nederland
Number of Children: 1 
Gerorge Conrad Theodor Koch
(I9978)
Birth about 187650 -- Den Helder, Noord-Holland, Nederland
1 . 1- Civil Marriage 6 February 1907 (Age 81) -- Den Helder, Noord-Holland, Nederland
Maria van der Plaat
(I9977)
Birth about 187742 40 -- Den Helder, Noord-Holland, Nederland
No children