See also: Ether 1:34
Elder Jeffrey R. Holland of the Quorum of the Twelve wrote: “One of the greatest prophets in the Book of Mormon goes unnamed in the record that documents his remarkable life. He is identified only as ‘the brother of Jared.’ Yet the revelation that unfolded before his eyes was so extraordinary that his life and legacy have become synonymous with bold, consummate, perfect faith” (Christ and the New Covenant: The Messianic Message of the Book of Mormon , 14).
The brother of Jared, pleading with the Lord on behalf of his family, provides an example of selfless service, humility, and faith. His life bears record that these qualities lead to divine revelation. Although the scriptural account never mentions it, the Prophet Joseph Smith revealed that this prophet’s name was Mahonri Moriancumer. — Introduction of the Book of Mormon Teacher Resource Manual.