Lewis married Susanna Aspinwall on 7 Sep 1813. Susanna (daughter of Dr. William Aspinwall, Sr. and Susanna Gardner) was born on 17 Jul 1790 in Brookline, Norfolk, Massachusetts, USA; died on 24 Mar 1853 in Brookline, Norfolk, Massachusetts, USA; was buried in Walnut Street Cemetery, Brookline, Norfolk, Massachusetts, USA. [Group Sheet] [Family Chart]

1. Susannah Aspinwall Tappan was born on 28 May 1815; died on 31 Dec 1817; was buried in Walnut Street Cemetery, Brookline, Norfolk, Massachusetts, USA.
2. William Aspinwall Tappan was born on 17 Sep 1819; died on 25 May 1905; was buried in Walnut Street Cemetery, Brookline, Norfolk, Massachusetts, USA.
3. Elizabeth Tappan was born on 4 Mar 1823; died on 8 May 1841; was buried in Walnut Street Cemetery, Brookline, Norfolk, Massachusetts, USA.
4. Lewis Henry Tappan was born on 18 Apr 1824; died on 10 Aug 1838; was buried in Walnut Street Cemetery, Brookline, Norfolk, Massachusetts, USA.
5. Lucy Maria Tappan was born on 17 Feb 1825 in Boston, Suffolk, Massachusetts, USA ; died on 25 Mar 1863 in Brooklyn,Kings,New York, USA; was buried on 29 Mar 1863 in Green-Wood Cemetery, Brooklyn, Kings, New York, USA.
6. George Tappan was born on 29 Jan 1829; died on 29 Jan 1829; was buried in Walnut Street Cemetery, Brookline, Norfolk, Massachusetts, USA.

Lewis married Sarah Jackson in Apr 1854. Sarah (daughter of Congressman William Jackson, Esquire and Hannah Woodward) was born on 14 Oct 1807 in Newton, Middlesex, Massachusetts, USA; died on 19 Jul 1884 in likely Brooklyn,Kings,New York, USA ; was buried in Green-Wood Cemetery, Brooklyn, Kings, New York, USA. [Group Sheet] [Family Chart]