William married Eunice Morse Fuller on 14 Dec 1840 in Waltham, Middlesex, Massachusetts, USA. Eunice (daughter of Abijah Jackson Fuller and Eunice Morse) was born on 29 May 1821 in Newton, Middlesex, Massachusetts, USA; died on 11 Mar 1846 in Waltham, Middlesex, Massachusetts, USA. [Group Sheet] [Family Chart]

1. Harriet Lucy or Livermore Child was born on 27 Oct 1841; died on 2 Feb 1925.
2. William Garland Child was born on 12 Feb 1843; died on 21 Mar 1902.
3. Ellen Eunice Child was born on 7 Apr 1845; died on 16 Jan 1868.