Horatio married Mary Smith Cady on 30 May 1815 in Canaan,Columbia,New York, USA . Mary (daughter of Oliver Cady, Jr. and Rebecca Smith) was born on 4 Nov 1798 in Canaan,Columbia,New York, USA ; died on 15 Mar 1861 in Chatham,Columbia,New York, USA; was buried in Chatham Union Cemetery,Malden Bridge,,New York, USA. [Group Sheet] [Family Chart]

1. Russell Cady Root was born on 25 Apr 1817; was christened on 10 Jul 1825 in Chatham,Columbia,New York, USA .
2. Dr. Erasmus Darwin Root was born on 7 May 1820 in likely Canaan,Columbia,New York, USA ; died on 27 Oct 1859.