Frederick married Mary Jane Strain in 1859. Mary (daughter of Joseph Sr Strain and Elizabeth Little) was born about 1835 in Co Monaghan, Ireland; died on 8 Sep 1880 in Flesherton, Grey Co, Ont; was buried on 11 Sep 1880 in Flesherton, Grey Co, Ont. [Group Sheet] [Family Chart]

1. Margaret E Armstrong was born about 1860.
2. George Armstrong was born about 1861 in Artemesia, Grey Co Ont.
3. Elizabeth Jane Armstrong was born on 5 Dec 1862 in Artemesia, Grey Co Ont; was christened on 23 Apr 1863 in Artemesia, Grey Co Ont; died in 1946 in Artemesia, Grey Co Ont; was buried in 1946 in Flesherton, Grey Co, Ont.
4. Sarah Jane Armstrong was born on 19 May 1867 in Artemesia, Grey Co Ont; was christened on 5 Oct 1867 in Artemesia, Grey Co Ont.
5. Charlotte Armstrong was born on 24 Jan 1869 in Artemesia, Grey Co Ont; was christened on 3 Oct 1869 in Artemesia, Grey Co Ont; died in 1945 in Artemesia, Grey Co Ont; was buried in 1945 in Flesherton, Grey Co, Ont.
6. Frederick William Armstrong was born about 1870 in Artemesia, Grey Co Ont; died in 1934 in Artemesia, Grey Co Ont; was buried in 1934 in Flesherton, Grey Co, Ont.
7. Clementina Armstrong was born on 1 Mar 1874 in Artemesia, Grey Co Ont; was christened on 23 Jan 1876 in Artemesia, Grey Co Ont.