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Marriage 20 February 1923 -- Leens, De Marne, Groningen, NetherlandsAafke Huizenga 
(I18696) Birth 1903 -- Den Hoorn, Leens, Groningen, Netherlands
Number of Children: 8 
1 . 1Jan Grondstra 
(I18701)
Private
1 . 2Johan Grondstra (I18702)
Private
1 . 3Willy Grondstra (I18703)
Private
1 . 4Martha Grondstra (I18704)
Private
1 . 5Herman Grondstra (I18705)
Private
1 . 6Froni Grondstra
(I18706) Death 21 October 2013
1 . 7Thomas Grondstra (I18707)
Private
1 . 8