Hyde was born in Montreal. He obtained a B.Sc. (Arch. Eng.) in 1899 and in 1901 he received a B.Sc. (Arch.) from the Massachusetts Institute of Technology. Hyde worked briefly with Taylor and Gordon before moving to Pittsburg where he practiced architecture from 1902-7. In 1907 he returned to Montreal where he worked independently until he merged his practice with that of Percy Erskine Nobbs in 1910. Hyde became a member of the Province of Quebec Association of Architects in 1907, served as President in 1928 and was elected a Fellow of the Royal Architecture Institute of British Architects in 1929. He was also an Associate of the Royal Architectural Institute of Canada. His long association with Percy Nobbs began in 1910 and lasted until Hyde's death in 1944.

For further information see the CAC's publication, Percy Erskine Nobbs and His Associates: A Guide to the Archive= Percy Erskine Nobbs et ses associés: Guide du fonds. Montreal: Canadian Architecture Collection, Blackader-Lauterman Library of Architecture and Art, McGill University, 1986 and in particular see page 44 for a brief biography.

John Hyde was born on June 3, 1853, at sea, while his parents were en route from Scotland to Canada.

He was a well-known accountant in Montreal, the founder of an accounting practice which later became Hyde-Houghton & Co. (the name was lost when the firm merged with BDO Dunwoody in 1999). He was also a founding member of the Dominion Society of Accountants (1902), which became what is known today as the Canadian Institute of Chartered Accountants (1951).

In 1878, he married Annie Isabella Gordon (d. 1890). In 1894, he married Adelaide Hyatt Gorham. He died on December 3, 1936, in Montreal, Quebec.

Mary Reppert was born in January 1879, in Jamestown, New York. She died April 23, 1957 in Montréal, Québec. She married George Taylor Hyde in approximately 1904, and they had two sons and one daughter between 1905 and 1912.

Nora Evelyn Anne Hyde (née Coghlin) was married to Justice G. Miller Hyde.

Walter C. Hyde, born in Beaconsfield on Montreal Island, studied to be an architect like his father. He graduated from the McGill University School of Architecture in 1915 before enlisting in the military, citing “architect” as his occupation. Before actually beginning that occupation, he had a distinguished military career as commander of the 68th Battery of the Canadian Field Artillery in Operation Syren, the 1918 northern Russia Expeditionary Force that aided the British in their objective of taking the Siberian ports of Murmansk and Archangel. These forces were withdrawn in 1919 and he was assigned to the US for instructional service, having received the Distinguished Service Order and the Order of St. Stanislas with swords, second class. During the interwar period, in addition to architectural work, he continued to serve as non-permanent active commander of the 2nd Montreal Regiment of the Royal Canadian Artillery. At the start of World War II, he became commandant at Canadian Forces Base Petawawa before being appointed Brigadier commander of the Royal Canadian Artillery 4th Division; he was recalled in 1944 to the Pacific Command in Vancouver.

Henry Mayers Hyndman was born on March 7, 1842, in London, England.

He was a British writer and politician. After graduation from Trinity College, Cambridge, in 1865, he studied law for two years before deciding to become a journalist. In 1866, Hyndman reported on the Italian war with Austria for The Pall Mall Gazette. In 1869, he toured the world, visiting the United States, Australia, and several European countries. In 1881, Hyndman established the Democratic Federation, which was renamed the Social Democratic Federation (SDF) in 1884. He was also the editor of Justice, the SDF weekly, and he supported Indian nationalism and independence from the British. Hyndman read Karl Marx's "The Communist Manifesto" and greatly impressed by his analysis of capitalism, he converted to socialism. During the 1880s, he was a prominent member of the Irish National Land League and the Land League of Great Britain. He participated in the unemployed demonstrations of 1887. Hyndman was chairman at the International Socialist Congress held in London in 1896. He was an anti-Semite, voicing anti-Semitic opinions concerning the Second Boer War (1899-1902) and blaming "Jewish bankers" and "imperialist Judaism" as the cause of the conflict. He was the author of "The Evolution of Revolution" (1920).

In 1876, he married Matilda Ware (c. 1846–1913), and in 1914, he remarried Rosalind Caroline Travers (1875–1923). He died on November 22, 1921, in London, England.