Canfield married three times. In 1922, he married his first wife, Katherine Temple Emmet, a descendant of
New York State Attorney General Thomas Addis Emmet. Before their divorce in June 1937, they were the parents of two sons: • Cass Canfield Jr. (1923–2013), a senior executive at Harper & Row who married Lili Finletter, daughter of
Thomas K. Finletter, in 1947, Sidney Howard in 1954, and Abigail Brosius Angell in 1973. •
Michael Temple Canfield (1926–1969), who was adopted by the Canfields. He was a London representative of Harper & Row who became the first husband of
Lee Radziwill. He married secondly the former
Frances Laura Charteris (who had been divorced from the
2nd Viscount Long and the
3rd Earl of Dudley). After his death, his widow married the
10th Duke of Marlborough (the eldest son of
Consuelo Vanderbilt). After their divorce, Katherine married, in October 1937, John D. W. Churchill. According to the memoirs of
Loelia, Duchess of Westminster, King
Edward VIII of the United Kingdom believed that Michael Canfield was actually the biological son of his brother
Prince George, Duke of Kent and socialite
Kiki Preston. In 1938, Canfield married his second wife, Jane Sage White, an author and sculptor. She was the former wife of
Charles Fairchild Fuller and a relative of
Ernest Ingersoll. By this marriage Canfield had three stepchildren: Jane Sage Fuller, Blair Fairchild Fuller, and Isabelle Whitney "Jill" Fuller. They remained married until Jane's death in 1984. In 1984, Canfield married Joan H. King. They remained married until his death in 1986. ==Quote==