I am a descendant of Jean/John Dumoulin, a Swiss who emigrated to Montreal around 1768 then to Cahokia about 1785, where he stayed till his death around 1808. He was judge of the St. Clair County Court of Common Pleas from 1790-95. When he moved to Cahokia, Dumoulin had three living children, born in Montreal: Charles (b 1771), Jean Emmanuel (b 1773), Louise Charles (b 1778) and Marguerite (b 1781), as well as his wife, Charlotte DuChouquet, b 1748. Marguerite returned to Montreal in 1800 to marry there. Charlotte died in Quebec in 1823. I am trying to find out (a) whether Dumoulin and his wife had any children in Cahokia (b) whether any of his children settled in the area and married there and (c) whether he has any known descendants today. Thanks for any help you can provide.