Jedediah Morgan Grant was a leader and an apostle of the Church of Jesus Christ of Latter-day Saints. He was member of the First Council of the Seventy from 1845 to 1854 and served in the First Presidency under church president Brigham Young from 1854 to 1856. He is known for his fiery speeches during the Reformation of 1856, earning the nickname "Brigham's Sledgehammer". Grant is the father of Heber J. Grant, who later served as President of the Church.

Seventy is a priesthood office in the Melchizedek priesthood of the Church of Jesus Christ of Latter-day Saints. Traditionally, a church member holding this priesthood office is a "traveling minister" and an "especial witness" of Jesus Christ, charged with the mission of preaching the gospel to the entire world under the direction of the Twelve Apostles. The church teaches that the office of seventy was anciently conferred upon the seventy disciples mentioned in the Gospel of Luke 10:1-2. Multiple individuals holding the office of seventy are referred to collectively as seventies.