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Donna Theo Strickland, CC, physicist (born 27 May 1959 in Guelph, ON). Donna Strickland is a pioneering physicist, known for her work on ultrafast lasers. She is currently a professor of physics at the University of Waterloo. She has authored more than 90 publications and has made seminal contributions to the field of laser technology. In 2018, Strickland was jointly awarded the Nobel Prize in Physics for her work on the development of laser technology.

Arthur Edwin Covington, scientist, astronomer (born at Regina 21 Sept 1913; died at Kingston, Ont, 17 Mar 2001). He earned a BSc and MSc in physics from UBC and completed his doctoral degree and post-graduate studies in nuclear physics at the University of California at Berkeley.

Ivan Peter Fellegi, OC, statistician (born 22 June 1935 in Szeged, Hungary). Ivan Fellegi served as Statistics Canada’s chief statistician for 23 years. In this role, he introduced new methods for collecting and compiling national statistics. He has also vocally defended the agency’s independence from politics.

Dorothea Ferguson (née Palmer), birth control advocate, social worker (born 1908 in England; died 5 November 1992 in Ottawa, ON). Dorothea Palmer was arrested in 1936 for advertising birth control to women in a working-class neighbourhood in Ottawa. She was cleared of charges after a lengthy trial proved her work had been for the public good. Her acquittal was a major victory for the birth control movement in Canada.

Lucille Teasdale Corti, CM, GOQ, surgeon, humanitarian (born 30 January 1929 in Montréal, QC; died 1 August 1996 in Lombardy, Italy).

Mabel Gardiner Hubbard Bell, aeronautics financier, community leader, social reformer and advocate for the deaf (born 25 November 1857 in Cambridge, Massachusetts; died 3 January 1923 in Chevy Chase, Maryland). Bell actively supported and contributed to the work of her husband, inventor Alexander Graham Bell. Her financial investment in his work made her the first financier of the aviation industry in North America. She was a community leader in Baddeck, Nova Scotia, where the Bell family spent their summers. She was also a social reformer and supported innovation in education.

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George Patrick Genereux, trapshooter, physician (b at Saskatoon 1 Mar 1935; d at Saskatoon 10 Apr 1989).

Crawford Stanley Holling, “Buzz,” OC, FRSC, ecologist (born 6 Dec 1930 in Theresa, New York; died 16 August 2019 in  Nanaimo, BC). One of the best-known Canadian forest entomologists, Holling gained international recognition for his work in the management of natural resources.

Gaspard-Joseph Chaussegros de Léry, military engineer (born 3 October 1682 in Toulon, France; died 23 March 1756 in Quebec City, QC). Chaussegros de Léry contributed to the development of New France by fortifying the colony’s towns, namely Quebec and Montreal. His relief maps of Quebec and Montreal are still regarded as accurate models of these cities. Some consider Chaussegros de Léry the father of the first truly Canadian architecture. (See also Architectural History: The French Colonial Regime.)

Donald Alfred Chant, OC, FRSC, scientist, educator, environmentalist, executive (born 30 September 1928 in Toronto, ON; died 23 December 2007 in Kingston, ON). Chant was one of the foremost experts on the phytoseiid family of predatory mites. A professor of zoology and administrator at the University of Toronto, he was also a prominent environmental leader and advocate.

Samuel Wilmot, pisciculturist, farmer, politician (born 22 August 1822 in Clarke Township, West Durham, Upper Canada; died 17 May 1899 in Newcastle, ON). Samuel Wilmot established one of North America’s first fish hatcheries on his farm in Newcastle, Ontario. He began as an amateur working in his basement and became a leading authority on fish culture. Wilmot established 15 hatcheries across Canada and his designs influenced other hatcheries in North America.

Eric William Leaver, inventor, electronics engineer (born 11 August 1915 in Langham, England; died 12 February 2004 in London, Ontario).

Lloyd Montgomery Pidgeon, OC, chemist (born 3 December 1903 in Markham, ON; died 9 December 1999).

Isobel Moira Dunbar, OC, FRSC, public servant, ice research scientist (born 3 February 1918 in Edinburgh, Scotland; died 22 November 1999 in Ottawa, ON).

Charles Alexander Mitchell, scientist, veterinarian, medical historian (b at Clarksburg, Ont 9 Aug 1891; d at Ottawa 8 July 1979).