John married Margaret Knowlton Hall on 1 Oct 1901 in Essex, Massachusetts, USA. Margaret (daughter of Alfred Henry Hall and Mary Delight Twichell) was born on 30 Sep 1877 in Plantsville, Southington, Hartford, Connecticut, USA; died on 31 Aug 1960 in Lawrence, Essex, Massachusetts, USA; was buried in Fairfield, Fairfield, Connecticut, USA. [Group Sheet] [Family Chart]

1. Alfred Hall Grant was born on 29 Apr 1904 in Hartford, Hartford, Connecticut, USA; died in Dec 1967 in Falmouth, Barnstable, Massachusetts, USA; was buried in Fairfield, Fairfield, Connecticut, USA.
2. John Phillips Grant was born on 12 May 1907 in Hartford, Hartford, Connecticut, USA; died in Feb 1979 in Belle Haven, Fairfield, Connecticut, USA.
3. Stephen Walkley Grant was born on 9 Jan 1909 in Elyria, Lorain, Ohio, USA; died on 30 Aug 1978 in Wellesley, Norfolk, Massachusetts, USA.