Hume Blake Cronyn, OC (July 18, 1911 – June 15, 2003) was a Canadian actor of stage and screen, who enjoyed a long career, often appearing professionally alongside his second wife, Jessica Tandy.
Hume Cronyn, one of five children, was born in London, Ontario, Canada, the son of Hume Blake Cronyn, Sr., a businessman and a Member of Parliament for London (after whom the Hume Cronyn Memorial Observatory and asteroid (12050) Humecronyn are named) and Frances Amelia (née Labatt), an heiress of the brewing company of the same name. His paternal grandfather, Verschoyle Cronyn, was the son of the Right Reverend Benjamin Cronyn, an Anglican cleric of the Anglo-Irish Protestant Ascendancy, who served as first bishop of the Anglican diocese of Huron, and founder of Huron College, from which grew the University of Western Ontario. His great-uncle, Benjamin, Jr., was both a prominent citizen and early mayor of London, Ontario, but was later indicted for fraud and fled to Vermont; during his tenure in London he built a mansion called Oakwood, which currently serves as the head office of the Info-Tech Research Group. Cronyn was also a cousin of Canadian-born theater producer, Robert Whitehead, and a first cousin of the Canadian-British artist Hugh Verschoyle Cronyn GM (1905–1996).
Hume Cronyn was the first Elmwood School boarder (at the time Elmwood was called Rockliffe Preparatory School) and boarded at Elmwood between 1917 and 1921. After leaving Elmwood, Cronyn went to Ridley College in St. Catharines, and McGill University in Montreal, where he became a member of The Kappa Alpha Society.