David Cowan Barker was born on March 21, 1831, in Bolton, England.

He was a Montreal Iron and Metal merchant.

In 1858, he married Annie Jackson Ferguson (1837–1865) and, in 1867, he remarried Mary Jane Hobson (1844–1906). He died on September 14, 1909, in Montreal, Quebec.

Sir Ernest Barker was born on September 23, 1874, in Stockport, Cheshire, England.

He was an English historian, teacher, and writer. He was educated at Manchester Grammar School and Balliol College, Oxford University. Barker was a Fellow of Merton College, Oxford, from 1898 to 1905, St John's College, Oxford, from 1909 to 1913, and New College, Oxford, from 1913 to 1920. He spent a brief time at the London School of Economics. He served as Principal of King's College London from 1920 to 1927, and subsequently became Professor of Political Science at the University of Cambridge in 1928, being the first holder of the chair endowed by the Rockefeller Foundation. In June 1936, he was elected to serve on the Liberal Party Council. Barker was knighted in 1944. In 1958, he was elected a Foreign Honorary Member of the American Academy of Arts and Sciences. His many works included "The Political Thought of Plato and Aristotle" (1906), "Political Thought in England from Herbert Spencer to the Present Day" (1915), "National Character and the Factors in its Foundation" (1927), "Reflections on Government" (1942) and "Principles of Social and Political Theory" (1951).

In 1900, he married Emily Isabel Salkeld (1871–1924) and, in 1927, he remarried Lady Olivia Stuart Horner (1891-1976). He died on February 17, 1960, in Cambridge, England.

George Frederick Barker was born on July 14, 1835, in Charlestown, Massachusetts.

He was an American physician and scientist. In 1858, he graduated from the Yale Sheffield Scientific School. He became a chemical assistant at Harvard Medical School in 1858–1859 and in 1860–1861, professor of chemistry and geology in Wheaton College, Illinois. In 1864, he became the professor of natural science at the Western University of Pennsylvania, now known as the University of Pittsburgh, where he undertook experiments to produce electric light by passing the current through a resisting filament. He subsequently went to Yale as a professor of physiological chemistry and toxicology, and later was a professor of physics at the University of Pennsylvania, in 1879–1900, when he became emeritus professor. He served as president of the American Association for the Advancement of Science in 1879; president of the American Chemical Society; vice-president of the American Philosophical Society; a member of the United States Electrical Commission; and for several years an associate editor of the American Journal of Science. He lectured in many cities and wrote several textbooks on chemistry and physics.

He died on May 24, 1910, in Philadelphia, Pennsylvania.

Harry Barker was born about 1872 in Dudley, England.

He moved to Canada in 1907. He served at McGill University for thirty years as a janitor in the Arts Building and at the Faculty of Law. Known as McGill's "poet laureate," much of his verse, written between 1908 and 1945, was published in the McGill Daily and the Literary Supplement. Barker was a student of Shakespeare who knew more about the Bard of Avon than most of the Honour English students who took rigorous courses in Elizabethan drama. He would stand for an hour leaning on his broom and reciting some of the more flown passages from Hamlet or The Merchant of Venice, while open-mouthed undergraduates stood and stared wondering that one head could hold all he knew. He was a kind of McGillian Homer who wrote poems with enthusiasm and love. In the 1930s, he published “Simple Rhymes for Simple Folk: Second Series.”

McGill University Department of English awards the Harry Barker Memorial Prize in English to the student with the highest standing in English in the initial year.

John Barker was a butcher who lived in London, England in the 18th century. He was the second husband of Sarah Hall Barker, who he married between approximately 1738 and 1755. He and Sarah had a daughter, Alice Barker Wise.