Jantje was born in 1861. Jantje Koster was the daughter of Derk Geerts Koster and Hillechien van Eken.
Jantje married 26 year old daglooner Jan Potgiesser (1869-) at 34.[1]
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K > Koster | P > Potgiesser > Jantje (Koster) Potgiesser