Sugulus (2 sugulussuhet)

^^

Robertus Petrus Martinus Gerardus Schipper on Arno Sewalt nõbu.

Hendricus Maria Johannes Schipper
& Clazina Johanna Verhage
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Clazina Elizabeth Schipper
& Arnold W. Sewalt 		  Petrus Ernest Cornelis Schipper
& A.J. Driehuis
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Arno Sewalt   Robertus Petrus Martinus Gerardus Schipper