Thomas married Harriett Ann SMITH on 27 May 1871. Harriett (daughter of Robert Robertson SMITH and Elizabeth CALLAGHAN) was born on 26 Apr 1856 in Bromley Twp., Renfrew, Ontario, Canada; was christened on 12 Jun 1856 in Bromley Twp., Renfrew, Ontario, Canada; died about 1943 in Niagara Falls, Ontario. [Group Sheet] [Family Chart]

1. Robert Richard TOUGH was born about 1872 in Hastings Co., Ontario; and died.
2. Thomas TOUGH was born about 1874; and died.
3. John TOUGH was born about 1876; and died.
4. George TOUGH was born about 1878; died in 1955.
5. Mary Bell TOUGH was born on 8 Feb 1881 in Wilberforce Twp., Renfrew, Ontario, Canada; died in 1971 in Little Current, Manitoulin, Ontario, Canada; was buried in Mountain View Cemetery, Manitoulin, Ontario, Canada.
6. Isabel TOUGH and died.
7. Ottolaine TOUGH and died.