Isaac married Alice Eleanor Froud on 21 Jan 1886 in Merlin, Ontario, Canada. Alice (daughter of Charles Froud and Mary Brooker) was born on 26 Jan 1866 in Shrubbs Hill, Sunningdale, Berkshire, England; died on 30 Oct 1934 in Norwich, Ontario, Canada; was buried in Bookton Cemetery, Ontario, Canada. [Group Sheet]

1. Charles Ernest Clifford was born on 23 Dec 1887; died on 27 Dec 1964 in Tillsonburg, Ontario, Canada.
2. Mary Alice Clifford was born on 17 Sep 1888 in Tilbury East, Ontario, Canada; died on 25 Dec 1981 in Norwich, Ontario, Canada.
3. William Middleton Clifford was born on 17 Mar 1890 in Merlin, Ontario, Canada; died on 17 May 1971 in Burgessville, Ontario, Canada.
4. Marion Elizabeth Clifford was born on 28 Apr 1892 in Raleigh, Ontario, Canada; died on 4 Dec 1918 in Fort William, Ontario, Canada.
5. Oliver Thomas Clifford was born on 7 Sep 1896; died in 1966 in Bookton, Ontario, Canada.
6. Marshall Froud Clifford was born on 17 May 1899 in Bookton, Ontario, Canada; died on 27 Dec 1959 in Middleton, Ontario, Canada.
7. Bernice Rose Clifford was born in 1902; died in 1902.

Isaac married Mary Jane Pollard on 23 Dec 1869 in Oxford County, Ontario, Canada. Mary (daughter of Jacob Pollard and Elizabeth Miners) was born in 1846 in St. Austell, Cornwall, England; died on 24 Oct 1883 in East Tilbury, Ontario, Canada. [Group Sheet]

1. Albert Clifford was born in 1870; died in Unknown.
2. Mary E. Clifford was born in Mar 1871; died on 8 May 1874.
3. Harriet Alice Clifford was born on 3 May 1873 in Putnamville, Ontario, Canada; died on 19 May 1875 in Putnamville, Ontario, Canada.
4. Rose Ellen Clifford was born on 15 May 1875 in Putnamville, Ontario, Canada; died on 7 Dec 1941 in Raleigh, Ontario, Canada.
5. Edith Gertrude Clifford was born in 1878 in Putnamville, Ontario, Canada; died in 1965 in Merlin, Ontario, Canada.

Thomas married Elizabeth Unknown. Elizabeth was born in Unknown; died in Unknown. [Group Sheet]