John Heffer
- Born: 4 Sep 1743, Great Shelford, Cambridgeshire England
- Christened: 1 Apr 1744
- Marriage (1): Constance Dean on 14 Dec 1768 in Great Shelford, Cambridgeshire England 778
- Died: 19 Mar 1786, Vestfold, Norway at age 42 778
John married Constance Dean, daughter of William Deans and Constance Tunnell, on 14 Dec 1768 in Great Shelford, Cambridgeshire England.778 (Constance Dean was born on 6 Nov 1748 in Great Shelford, Cambridgeshire England and died on 2 Mar 1827 in Great Shelford, Cambridgeshire England 778.)
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