Johann Jacob was born on October 3rd, 1750. Johann Jacob's father was Martin Zorn and his mother was Catharina Bürk. His paternal grandparents were Balthasar Zorn and Martha Weitnauer. He had a brother and two sisters, named Balthasar, Martha and Anna. He had two half-brothers named Zorn and Johannes. He died at 3 months old on February 1st, 1751.