Antiomno was a Lamanite king ruling the land of Middoni during a period marked by significant missionary activities among the Lamanites, approximately in the year 90 BC. Known for his amicable relations with King Lamoni of Ishmael, Antiomno became an unwitting participant in the unfolding of Nephite missionary efforts. After Lamoni’s conversion through the teachings of Ammon, a Nephite missionary, Ammon received divine instruction to rescue his brethren who were imprisoned in Middoni (Alma 20:4).
Under these directives, Ammon and Lamoni approached Antiomno to secure the release of the Nephite missionaries Aaron, Muloki, and Ammah, who had been cast into prison while preaching in Antiomno’s lands (Alma 20:2). By leveraging their friendship and the goodwill between the two kings, Lamoni successfully persuaded Antiomno to free them from incarceration (Alma 20:28-30). Antiomno’s actions, although seemingly a minor footnote in the larger narrative, contributed to the continuance of missionary work that would lead to significant spiritual transformations among the Lamanite population. Through his decision to grant release to Aaron and his companions, he played an indirect role in facilitating the spread of gospel teachings across Lamanite territories.