1. | Johann Friedrich August Koplin was born 1842. Johann married Caroline Wilhelmine Albertine Retzlaff 1867. Caroline (daughter of Ignace Leveque and Petronille Marie Lavoie, daughter of Carl Ludwig Retzlaff and Marie Friedricke Wilhelmine Höfs) was born 5 Dec 1842, Gienow, Regenwalde, Stettin, Pommern, Preussen. [Group Sheet] Children:
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