Dulles was born on April 7, 1893, in Watertown, New York, one of five children of Presbyterian minister Allen Macy Dulles, and his wife, Edith F. (Foster). He was five years younger than his brother John Foster Dulles, Dwight D. Eisenhower's Secretary of State and chairman and senior partner of Sullivan & Cromwell, and two years older than his sister, diplomat Eleanor Lansing Dulles. His maternal grandfather, John W. Foster, was Secretary of State under Benjamin Harrison, while his uncle by marriage, Robert Lansing was Secretary of State under Woodrow Wilson. Dulles was uncle to Avery Dulles, a Jesuit priest and cardinal of the Catholic Church, who taught theology at Fordham University from 1988 to 2008.