Jane Thomas was the wife of E. Blackwell, the mother of Joseph Blackwell, the grandmother of James Blackwell, the great-grandmother of Samuel Blackwell, and the ancestor of John Blackwell, Cassie Blake, Diana Meade, and John Blackwell's four other unknown children. She has yet to appear physically on the show, but was listed on the Blackwell Family Tree.
Jane was a member of the Blackwell Family.