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Marriage 2 June 1921 -- Muntendam, Menterwolde, Groningen, NetherlandsGrietje Zuur 
(I09865) Birth 26 February 1901 -- Kolham, Slochteren, Groningen, Netherlands
Death 22 June 1959 (Age 58) -- Hoogezand, Hoogezand-Sappemeer, Groningen, Netherlands
Number of Children: 1 
Roelof Berend Koops 
(I26744) Birth 11 September 1921
Death May 1988 (Age 66)
1 . 1-
Trijntje van de Werf
(I26745) Birth 1 June 1920
Unknown children