Overview
According to the Book of Mormon, Mosiah II, King Benjamin's son and Mosiah I's grandson, was king of the Nephite nation from about 124 BC to 91 BC. The Book of Mosiah is named after Mosiah II. Mosiah was also a prophet and is described by Ammon as a "seer" who could translate records.
Accounts
Mosiah instituted a new governing system after all of his sons declined to succeed him as king, choosing rather to preach the gospel. This new government was based on judges elected and chosen by the people. After Mosiah's death in approximately 91 BC, this council of elected judges constituted the government of the land until Christ visited the Nephite nation (see ).
Possible origin of the name
Mosiah II was presumably named after his grandfather.
Hugh Nibley relates the name to a combination of the name Moses with that of Yahweh (Jehovah).
From Wikipedia (CC BY-SA 4.0).