Isaac married Abigail Jackson on 26 Feb 1784 in Newton, Middlesex, Massachusetts, USA. Abigail (daughter of Deacon Joseph Jackson, Jr. and Abigail Brown) was born on 21 Apr 1763 in Newton, Middlesex, Massachusetts, USA; died in 1833; was buried in Needham Cemetery, Needham, Norfolk, Massachusetts, USA. [Group Sheet] [Family Chart]

1. Abigail Jackson Greenwood was born on 28 Sep 1786 in Dublin, Cheshire, New Hampshire, USA; died on 13 Feb 1870 in Newton, Middlesex, Massachusetts, USA; was buried in Saint Mary's Church, Newton, Middlesex, Massachusetts, USA.