Mary Ann Henry was born May 11, 1854, in San Bernardino, California, to Robert Henry and Mary Ann Ross. She married William Rice King on November 29, 1869, in Salt Lake City, Utah. She went with her husband, William, on his mission to the Sandwich Islands in 1886, and returned home with him in 1890. Mary Ann had seven children, six boys and one girl. She died on April 16, 1943.

William Rice King was born on April 8, 1834, in Cicero, Onondaga, New York, to Thomas Rice King and Matilda Robison. He married his first wife, Josephine Henry, on January 20, 1861, in Fillmore, Millard, Utah. Together, they had four children. Josephine died after giving birth to her fourth child, and William then married her cousin, Mary Ann Henry, in 1869. William and Mary Ann had seven children together.

Throughout his life, William worked as a merchant, a manufacturer, and a stock raiser. He was called to serve a mission for the Church of Jesus Christ of Latter-day Saints in the Sandwich Islands. He was set apart as a missionary on October 18, 1886, and then called as president of the Sandwich Islands mission in April of 1887. His wife, Mary Ann, accompanied him on this mission. William was released and he and Mary Ann returned home in 1890.

William also served missions in the United States and in Ireland. He served as a member of the high council and as a bishop. William King died on February 17, 1892 in Salt Lake City, Utah.