Here is some information I saw on a Wynkoop genealogy regarding Isaac Cannell and Mary Wynkoop. She married in 1807 and had Hester Anne Cannell born 1807. Hester Anne Cannell survived to adulthood and was living in Philadelphia Pa in 1869 unmarried. Mary Wynkoop Cannell died in 1807. It appears from the dates that she likely died during Hester Anne Cannell's birth or shorthly thereafter. The information I found on Mary Wynkoops' family showed her as having one sister who lived to adulthood a Hester Catalina (Cathelina)Wynkoop b 5 Mar 1784 who married Richard Barroll of Chestertown, MD and died in 1812. The information showed that there were also two brothers who both died within a day of birth. Hope this helps.