In the Book of Mormon, a son of King Mosiah. Ammon served as a missionary whose diligent efforts helped to convert many souls to Christ.

Was an unbeliever who sought to destroy the Church, Mosiah 27: 8-10, 34. An angel appeared to him and his companions, Mosiah 27: 11. Repented and began preaching the word of God, Mosiah 27: 32-28: 8. Refused to be named king and went instead to the land of the Lamanites to preach the word of God, Alma 17: 6-9. Fasted and prayed for guidance, Alma 17: 8-11. Was taken bound to King Lamoni, Alma 17: 20-21. Saved Lamoni's flocks, Alma 17: 26-39. Preached to Lamoni, Alma 18: 1-19: 13. Thanked God and was overpowered with joy, Alma 19: 14. His converts never fell away, Alma 23: 6. Rejoiced in being an instrument in God's hands in bringing thousands to the truth, Alma 26: 1-8 (Alma 26: 1-37). Led the people of Anti-Nephi-Lehi to safety, Alma 27. Felt great joy in meeting his brethren, Alma 27: 16-18.