Martin married Eula Agnes HUNT on 22 Aug 1923 in Pembroke, Renfrew, Ontario, Canada. Eula (daughter of Joseph HUNT and Ida Jane GREER) was born on 20 Mar 1902 in Wilberforce Twp., Renfrew, Ontario, Canada; died on 29 Dec 1929 in , , , Egypt; was buried in Wilberforce Twp., Renfrew, Ontario, Canada. [Group Sheet] [Family Chart]

1. Reid Joseph SLACK was born on 31 Dec 1924 in Asyut, Asyut Governorate, Egypt; died on 24 Dec 2014 in Kingston, Frontenac, Ontario, Canada; was buried in , Frontenac Co., Ontario, Canada.
2. Living
3. Milton Greer SLACK was born on 23 Oct 1927 in Assuit, , , Egypt; died on 20 Nov 1982 in Thompson, Manitoba.
4. Ella F. SLACK was born in Dec 1929 in Assuit, , , Egypt; died in 1958.

Martin married Matilda Bradley 'Tillie' JOHNSTON on 22 Apr 1931 in Forester's Falls, Renfrew, Ontario, Canada. Matilda (daughter of James R. JOHNSTON and Matilda BRADLEY) was born on 5 Jul 1906 in Forester's Falls, Renfrew, Ontario, Canada; died on 7 Oct 1970 in Brockville, Grenville, Ontario, Canada; was buried in Lynhurst, Ontario. [Group Sheet] [Family Chart]

1. Johnston Wilfred SLACK was born on 1 Mar 1932; died in Jul 2004 in , , Alberta, Canada.
2. Winston Paul SLACK was born on 1 Mar 1932; died in Jan 2005.
3. Duane Philemon SLACK was born on 13 Nov 1935 in Madoc, Hastings, Ontario, Canada; died on 15 Dec 2010 in Milton, Halton, Ontario, Canada; was buried in Milton, Halton, Ontario, Canada.
4. Elwood Nathan James SLACK was born on 20 Aug 1937 in Eldorado, , Ontario, Canada; died on 17 Feb 2014 in Athens, Leeds & Grenville, Ontario, Canada; was buried in Seeley's Bay, Leeds, Ontario, Canada.
5. Wendel SLACK was born about 1940; died in Jan 1992.
6. Crawfton SLACK was born about 1943; died in Deceased.
7. Living

George + Susan REED. Susan and died. [Group Sheet] [Family Chart]