Bernardina Dublon was born Bernardina Kahn, the daughter of Raphael Kahn. It is possible that her mother was Bernardina Nathan, perhaps the second wife of Raphael. Bernardina was born in Schweich in 1772 and married Bernard Dublon about 1790 in Wittlich.
I’m not sure about these dates or the progression, but the information we have so far suggests as follows:
Bernard and Bernardina had four children, all born in Wittlich, Germany:
Sara Brendel Dublon (15 April 1790 to 30 August 1835) – married Salomon Dublon – 10 children: Rachel (1820); David (1820); Michel (1822); Elisabeth (1824); Rachel Robert (1825); Johanna (1827); Bernard (1828); Samuel (1830); Sara (1832); Caroline (1834).
Joseph Dublon (1795-1863)
Rachel Dublon (b. 1800)
Caroline Helene Dublon (1802-1862) – married Abraham Schoemann on 2 August 1833 and had three children: Jacob (1837); Madeline (1839); Marcus (1845).
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Jakob, Madeleine and Markus Schoemann were the children of another Abraham Schoemann, born oct 24. 1807 in Seibersbach, died june 2nd 1863 in Sohren, married to Karoline Schuster 1807- june 1st 1882 in Sohren. They moved to Paris about 1865. Would you like to get their family tree, though they are not related to Kahn’s? (Nor to my own family).