William married Mary Pope Carr 3 Aug 1909. Mary (daughter of George Washington Carr and Sarah Hope Compton) was born 20 Jun 1885, , , Prince Edward Island, Canada; died 29 Dec 1953, Wetaskiwin, , Alberta, Canada; was buried , Wetaskiwin Cemetery, Wetaskiwin, , Alberta, Canada. [Group Sheet]

1. Catherine Montgomery was born 1911; died 1911; was buried , North Bedeque Cemetery, North Bedeque, , Prince Edward Island, Canada.
2. James William Montgomery was born 1912.
3. Marjorie Hope Montgomery was born 4 Jan 1916, Bedeque, , Prince Edward Island, Canada.
4. Olive Montgomery was born 1921; died 1922; was buried , Wetaskiwin Cemetery, Wetaskiwin, , Alberta, Canada.
5. Dorothy Francess Montgomery