^^ 
         Hendricus Maria Johannes Schipper & Clazina Johanna Verhage          
                                      |                                       
                ----------------------------------------                      
                |                                      |                      
 Petrus Ernest Cornelis Schipper    Hendrikus Johannes Schipper & Apolonia    
         & A.J. Driehuis                  Joanna Maria van der Lubbe          
                |                                      |                      
    Eduard Gerardus Schipper               Petrus Theodorus Schipper
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