John married Cox, Phoebe on 24 Jun 1777 in Cambridge, Middlesex, Massachusetts, United States. Phoebe (daughter of Cox, Matthew and Russel, Elizabeth) was born on 14 Apr 1754 in Cambridge, Middlesex, Massachusetts, United States; was christened on 14 Apr 1754 in Cambridge, Middlesex, Massachusetts, United States. [Group Sheet] [Family Chart]