Alexander Harris married Ursula Carr. They had several children including a son, Robert Carr Harris, who was born in 1843. Robert Carr-Harris, a professor of engineering at the Royal Military College of Canada and his wife Ellen Jane Fitton Carr-Harris had several children: Mary Alexandria (b. Mar 1, 1875); Ferguson (b. Dec 25, 1877); Captain Ernest Dale (b. Feb 14, 1878); #555 Robert R. (civil engineer b. April 1881); Athol (civil engineer b. Sep 1883); Grant (b. Jun 1898); Guy (b. Jun 1898), #1325 Lorne Howland (b. 1899). All of Robert Carr Harris' sons and two of his nephews were cadets at the Royal Military College of Canada in Kingston, Ontario. Alexander Harris' grandson Grant Carr-Harris wrote the biography 'The secrets of Alexander Harris' in 1961. Grant Carr-Harris also wrote 'Carr-Harris - history & genealogy' (Toronto 1966). Lorne Carr-Harris was the goalie on the British ice hockey team which won the bronze medal at the 1924 Winter Olympics in Chemoix, France.Captain Ernest Dale Carr-Harris R.E., who died on November 3, 1914 at 36 years of age, was commemorated on page 565 of the First World War Book of Remembrance.