Thomas married Mary Kathleen O'Donnell on 31 Jul 1929 in Sand Point, Ontario, Canada. Mary (daughter of James O'Donnell and Honora Teressa McManus) was born on 29 Aug 1898 in McNab Township, Renfrew County, Ontario, Canada; died in 1997; was buried in St. Alexander's Roman Catholic Cemetery, Sand Point, Ontario, Canada. [Group Sheet] [Family Chart]

1. Bernard Holly was born on 20 May 1930 in Sand Point, Ontario, Canada; died on 21 Mar 1998 in Ottawa, Ontario, Canada; was buried in Saint Isidore Roman Catholic Cemetery, Kanata, Ontario, Canada.
2. Theresa Margaret Mary Holly was born on 25 Nov 1932 in Ottawa, Ontario, Canada; died on 6 Jan 2023 in Marblehead, Ohio, USA; was buried in Saint Joseph Catholic Cemetery, Marblehead, Ohio, USA.
3. Gregory Holly was born in 26 May.
4. Basil Holly was born in 4 May.
5. Infant John Holly was born on 21 Sep 1951 in Braeside, Ontario, Canada; died on 21 Sep 1951 in Braeside, Ontario, Canada; was buried in St. Alexander's Roman Catholic Cemetery, Sand Point, Ontario, Canada.

John married Margaret Cull on 11 May 1896 in Brudenell, Ontario, Canada. Margaret was born on 26 Jun 1873 in Brudenell, Ontario, Canada; died on 26 Mar 1958 in Douglas, Ontario, Canada; was buried in Saint Michael Roman Catholic Cemetery, Bromley, Ontario, Canada. [Group Sheet] [Family Chart]