Alvin Smith was the eldest brother of Joseph Smith, founder of the Latter Day Saint movement. Alvin took a leading role in helping the Smith family work toward paying their debts and building their home. His death at age 25 resulted in his younger brothers Hyrum and Joseph taking more of a leading role in family affairs. A vision by Joseph Smith showed Alvin, who was not baptized while alive, in the celestial kingdom, which is the highest of the degrees of glory. His presence in the life of young Joseph Smith and in that vision played a significant role in the establishment of the Latter Day Saint doctrines of redemption of those who die without a knowledge of the gospel, as well as the practice of baptism for the dead in the Church of Jesus Christ of Latter-day Saints.

Lucy Mack Smith was the mother of Joseph Smith, founder of the Latter Day Saint movement. She is noted for writing the memoir, Biographical Sketches of Joseph Smith, the Prophet, and His Progenitors for Many Generations and was an important leader of the movement during Joseph's life.