Hello Mr. Koopmann,
Carsten Koopmann was born in Bürgerfelde, now part of the city of Oldenburg. His wife was Gerhardine Antonie Bochow born in Oldenburg. This couple had another child in Zetel with Emma Charlotte Henriette born 1 Sep 1844.
If you would send me your informations about the children of the couple Koppmann and Harms with their partners and children I would present it on our page www.auswanderer-oldenburg.de.
Best regards,
Gunter Jüchter