Hugh Bingham O'Heir was born on December 14, 1895, in Oshkosh, Wisconsin.

He served in the Canadian Over-Seas Expeditionary Force in the UK (1918-19). He studied at McGill University (M.Sc. 1924).

He died in 1956, in London, England.

Joseph Sylvester O'Halloran was born on March 28, 1842, in Adelaide, Australia, the son of Captain William Littlejohn O'Halloran (1806-1885) and Eliza Minton Smith (1810-1884).

He was a civil servant. He was educated at private schools and entered the South Australian Civil Service, receiving his first appointment at Governor Sir Richard Graves MacDonnell's office. After passing ten years in the Audit Office, he was promoted to the clerkship of the Executive Council. He also served as a gazetted Clerk to the Court of Appeals and a private secretary to the Right Hon. Sir James Fergusson, 6th Baronet, Governor of the colony. O'Halloran retired from the Government service in 1871 and moved to England, where he was elected a Fellow of the Royal Geographical Society and the Royal Colonial Institute. He travelled to New Zealand (1873) and the Cape of Good Hope (1877). In 1881, he was appointed assistant secretary and librarian of the Royal Colonial Institute, and in 1883, to the position of its secretary until 1909. He visited Canada in 1882 and 1884, attending the Montreal meeting of the British Association for the Advancement of Science as one of the secretaries to the Geographical Section. Before returning to England, he made an extended tour through Nova Scotia, New Brunswick, and Prince Edward Island. O'Halloran was a contributor to the Dictionary of National Biography (as J. S. O'H).

In 1886, he married Alice Mary Simpson (1853–1923). He died on January 25, 1920, in Cheltenham, Gloucestershire, England.

John Ogilvy was born in Scotland and came to Canada where he became a partner in the firm of Parker, Gerrard and Ogilvy. His firm traded extensively at Michilimackinac and later joined Forsyth, Richardson and Co. to form the XY Company as one of its main directors. In 1804 he signed the agreement under which the XY Company and the NWC united. Toward the end of his career he was appointed a commissioner, under the terms of the Treaty of Ghent, for determining the boundaries of British North America and died while performing this task.

Campbell Patrick Ogilvie was born on March 21, 1854, in Crediton, Devon, England.

He was a civil engineer and naturalist. He was also a great traveller and frequently visited South America, where he was interested in railways and land development. He served as a director of the Central Argentine Railway, the Primitiva Gas Company of Buenos Aires, and other South American Companies. He was also a director and Deputy Chairman of the Powell Duffryn Steam Coal Company of South Wales and had large coal and iron interests in Russia. In 1891, he was elected Fellow of the Royal Society of Arts. In 1910, he edited and read a paper entitled "Argentina from a British Point of View," for which he received the Society’s Silver medal. Ogilvie was also a Fellow of the Linnean Society and a member of the British Society. He was a keen student of fish life and acted as honorary curator of the Yarmouth Museum.

In 1900, he married Martha Emma Luise Frolich (1871–1930). He died on May 22, 1927, in Westminster, Middlesex, England.