John Jeffery Farnol (10 February 1878 - 9 August 1952) was an English author, known for his many romantic novels, some formulaic and set in the English Regency period, and swashbucklers. He with Georgette Heyer founded the Regency romantic genre; two of his early books, The Amateur Gentleman and The Broad Highway, have been issued in a version edited by Barbara Cartland.
He was born in Aston, Birmingham, and brought up in London and Kent. He attended the Westminster Art School, after he had lost his job in a Birmingham metal-working firm. In 1900, he married Blanche Hawley, daughter of the noted New York scenic artist Hughson Hawley; they moved to the United States, where he found work as a scene painter.
The success of his early novels led Farnol to become a professional writer; he returned to England around 1910, and settled in Eastbourne, Sussex. He produced around 40 novels and volumes of stories, and some non-fiction and children's books. He died after a long battle with cancer. His last book was completed by his second wife Phyllis, whom he had married in 1938.