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Marriage 15 June 1906 -- Wildervank, Veendam, Groningen, NetherlandsJan Eerke Onnes 
(I01945) Birth 2 March 1881 -- Wildervank, Veendam, Groningen, Netherlands
Death 8 November 1975 (Age 94) -- Wildervank, Veendam, Groningen, Netherlands
Number of Children: 2 
Harm Jakob Onnes
(I23815) Birth 4 June 1907 -- Wildervank, Veendam, Groningen, Netherlands
Death 6 June 1907 (Age 2 days) -- Wildervank, Veendam, Groningen, Netherlands
1 . 1Herman Jakob Onnes
(I23816) Birth 10 March 1909 -- Wildervank, Veendam, Groningen, Netherlands
Death 10 December 1957 (Age 48) -- Groningen, Groningen, Groningen, Netherlands
1 . 2- Marriage March 1944
Number of Children: 1 Alagonda Roelfina Onnes 
(I25298) Birth 29 January 1945 -- Wildervank, Veendam, Groningen, Netherlands
Death 3 February 1945 (Age 5 days) -- Wildervank, Veendam, Groningen, Netherlands
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