Sugulus (2 sugulussuhet)
Robertus Petrus Martinus Gerardus Schipper on
Johannes Stephanus Schipper nõbu.
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Muidugi,
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Hendricus Maria Johannes Schipper
(1 sugulussuhe)
Vaata
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Clazina Johanna Verhage
(1 sugulussuhe)
Vaata
on samal ajal
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Johannes Stephanus Schipper vanavanemad
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Robertus Petrus Martinus Gerardus Schipper vanavanemad