Joseph married Elizabeth Salter Weld Pearson on 27 Jun 1819 in Roxbury, Suffolk, Massachusetts, USA. Elizabeth (daughter of Thomas Pearson, Sr. and Abigail Weld) was born on 2 Oct 1799 in Brighton, Suffolk, Massachusetts, USA; died on 4 Jan 1892 in Boston, Suffolk, Massachusetts, USA. [Group Sheet] [Family Chart]

1. Elizabeth Frances Swain was born on 6 Oct 1819 in Roxbury, Suffolk, Massachusetts, USA; died on 28 Feb 1894 in Reading, Middlesex, Massachusetts, USA.
2. Joseph Swain was born on 2 May 1821 in Roxbury, Suffolk, Massachusetts, USA; died before 1830 in Roxbury, Suffolk, Massachusetts, USA.
3. Charles Davis Swain was born on 27 Oct 1822 in Roxbury, Suffolk, Massachusetts, USA; died on 11 Mar 1886 in Boston, Suffolk, Massachusetts, USA.
4. Angelina Swain was born on 19 Jun 1825 in Roxbury, Suffolk, Massachusetts, USA; died on 23 Oct 1831 in Roxbury, Suffolk, Massachusetts, USA.
5. Jane Maria Swain was born on 13 Aug 1827 in Roxbury, Suffolk, Massachusetts, USA; died on 10 Jun 1908 in Boston, Suffolk, Massachusetts, USA; was buried in Forest Hills Cemetery, Boston, Suffolk, Massachusetts, USA.
6. Joseph Henry Swain was born on 11 Jul 1830 in Roxbury, Suffolk, Massachusetts, USA; died on 13 Jun 1892 in Boston, Suffolk, Massachusetts, USA.
7. Edwin Augustus Swain was born on 12 Mar 1833 in Roxbury, Suffolk, Massachusetts, USA; died on 15 Sep 1863.
8. Julius Marshall Swain was born on 16 Nov 1835 in Roxbury, Suffolk, Massachusetts, USA; died on 5 Jul 1911 in Boston, Suffolk, Massachusetts, USA; was buried in Forest Hills Cemetery, Boston, Suffolk, Massachusetts, USA.
9. Emma Adelaide Swain was born on 1 Dec 1843 in Roxbury, Suffolk, Massachusetts, USA; died on 30 Dec 1882 in Boston, Suffolk, Massachusetts, USA; was buried in Forest Hills Cemetery, Boston, Suffolk, Massachusetts, USA.