Alexander Taylor Machattie was born in 1842, in Glasgow, Lanarkshire, Scotland.

He was an analytical chemist in London, Ontario. Around 1868 he founded and operated the Ontario Chemical Works, a subsidiary of the British company, Western Canada Oil Lands, producing sulphuric acid. In 1878, it was taken over by the Canada Chemical Manufacturing Company.

In 1868, he married Mary Ann Craig (1845-). He died in September 1879, in Manchester, Lancashire, England.

Maria Machin was born in Sherbrooke and raised in Québec City. She completed her education in England by training as a nurse under Florence Nightingale at St. Thomas' Hospital, London. From 1875 to 1877 she headed the first group of professional nurses to work in the Montreal General Hospital. She returned to England to become matron of St. Bartholomew's Hospital, London, a position she held until 1881, when she married a Mr. Redpath and moved to South Africa. Mrs. Redpath established a hospital in Bloemfontein, and later nursed at Kimberley during the Boer War. She died in South Africa.

Macintosh & Hyde was a firm of chartered accountants, auditors, and financial agents, established in 1835 in Montreal, Quebec. The founding members were John Macintosh, C.A. and George Hyde, C.A.

Frank Campbell MacIntosh was born in Baddeck, Nova Scotia. He completed both his BA (1930) and MA (1932) at Dalhousie University. In 1933, Dr. MacIntosh joined the laboratory of Boris P. Babkin at the Department of Physiology of McGill University. McGill awarded Dr. MacIntosh his Ph.D. in 1937, the Royal Society of Canada awarded him a traveling fellowship and he went to London to work under Sir Henry Dale at the National Institute of Medical Research. He was appointed to the Institute staff in 1938 and remained there until 1949. That same year, he returned to Canada to become Joseph Morley Drake Professor and Chair of the Department of Physiology at McGill University. Dr. MacIntosh retired from full-time service to McGill in 1978, but as Professor Emeritus, his association continued. ("Progress in Brain Research" 98: xv-xvi, 1993)

Keitha Kinsman Pearce-MacIntosh was born on July 5, 1924, in Lachine, Quebec.

She was a Canadian poet and educator. She was a registered nurse before earning her B.A. and M.A. degrees. She was also a professor of English at Vanier College for twenty-two years (1973-1995). Keitha and her husband ran a dairy farm in Dewittville, Quebec, but as Keitha became more independent, she wanted a place of her own. After the farm was sold, she lived in a trailer until the restoration of her 200-year-old log cabin was completed. She was active in promoting literacy and access to books. She was always on the side of the underdog, whether for women’s rights, for Natives and French Canadians who had been dispossessed by the newly arrived English, or English-speaking Quebecers whose rights had been denied by the French. In 1972, she co-founded the Little Green Library in Huntingdon, Quebec. In the 1970s, she contributed to a poetry renaissance in Montreal by publishing and editing the magazine Montreal Poems. After she retired, she moved to Vancouver, where she lived for the next fifteen years. She published many of her poems in various magazines, e.g., Ellipse, Other Voices, Quebec Histoire, Anthol, Cross Country, Canadian Author, and Bookman. She is the author of collections of poems, "The Shattered Glass and Other Fragments" (1976) and "Poems of the Chateauguay Valley" (1981).

She died on August 17, 2012, and is buried in Ormstown, Quebec.