^^

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         Hendricus Maria Johannes Schipper & Clazina Johanna Verhage          
                                      |                                       
           ----------------------------------------                           
           |                                      |                           
   Martinus Hendricus    Hendrikus Johannes Schipper & Apolonia Joanna Maria  
        Schipper                            van der Lubbe                     
                                                  |                           
                                      Petrus Theodorus Schipper