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 These forces were withdrawn in 1919 and he was assigned to the US for instructional service, having received the Distinguished Service Order and the Order of St. Stanislas with swords,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.

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

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.

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.

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.

Alpheus Hyatt was born on April 5, 1838, in Washington, D.C.

He was an American zoologist and paleontologist. He briefly attended the Maryland Military Academy and Yale University, and after graduating from Harvard University in 1862, he enlisted in the Massachusetts Volunteer Infantry for the Civil War, emerging with the rank of captain. After the war, he worked at the Essex Institute (now the Peabody Essex Museum) in Salem, Massachusetts. He co-founded American Naturalist and served as its editor from 1867 to 1870. He became a professor of paleontology and zoology at the Massachusetts Institute of Technology in 1870, where he taught for eighteen years, and was a professor of biology and zoology at Boston University from 1877 until his death in 1902. He also served as curator of the Boston Society of Natural History. In 1875, he was elected a member of the National Academy of Sciences. In 1898, he received the honorary degree of LL.D. from Brown University.

In 1867, he married Audella "Della" Beebe (1840–1932). He died on January 15, 1902, in Cambridge, Massachusetts.