Jacob married Martha Bradbury HOPKINSON on 9 Feb 1845 in Buxton, York, Maine. Martha (daughter of Moses HOPKINSON and Elizabeth HAMLIN) was born on 6 Aug 1825 in Buxton, York, Maine; died on 22 Feb 1892 in Lawrence, Essex, Massachusetts; was buried in Park Cemetery, Tilton, Belknap, New Hampshire. [Group Sheet] [Family Chart]

1. Clara Augusta McDUFFEE was born on 8 Mar 1846 in Rochester, Strafford, New Hampshire; died on 11 Jul 1920 in Tilton, Belknap, New Hampshire.
2. Edward Arthur McDUFFEE was born on 3 Apr 1851 in Rochester, Strafford, New Hampshire; died on 9 Jan 1922 in Ariel, Cowlitz, Washington.
3. James Frank McDUFFEE was born on 22 Jan 1854 in Whitefield, Coos, New Hampshire; died on 17 Apr 1867 in Whitefield, Coos, New Hampshire.
4. Charles Sumner McDUFFEE was born on 23 Jun 1856 in Lawrence, Essex, Massachusetts; died on 7 May 1928 in Seattle, King, Washington.
5. William Osman McDUFFEE was born on 12 Sep 1859 in Whitefield, Coos, New Hampshire; died on 7 Aug 1934 in Tilton, Belknap, New Hampshire; was buried in 1934 in Park Cemetery, Tilton, Belknap, New Hampshire.
6. Everett Hopkinson McDUFFEE was born on 17 Jun 1862 in Lawrence, Essex, Massachusetts; died on 13 Jul 1940 in Sacramento, California; was buried in Masonic Lawn Cemetery, Sacramento, California.
7. Cora Belle McDUFFEE was born on 7 Feb 1865 in Boston, Suffolk, Massachusetts; died on 29 May 1931 in Dubuque, Iowa; was buried in Linwood Cemetery, Dubuque, Iowa.

Jacob married Susan Terry WHITAKER in 1896. Susan was born on 30 May 1826 in Batavia, Clermont, Ohio; died on 2 Aug 1913 in Portland, Multnomah, Oregon; was buried in Lone Fir Pioneer Cemetery, Portland, Multnomah, Oregon. [Group Sheet] [Family Chart]

James married Hannah HAM on 17 Jan 1821. Hannah was born on 27 Jan 1801 in Rochester, Strafford, New Hampshire; died on 10 Apr 1890 in Rochester, Strafford, New Hampshire. [Group Sheet] [Family Chart]