Moroni means "in fire." There are no other spellings associated with the archangel Moroni's name.
Moroni is known as the angel of revelation to members of the Church of Jesus Christ of Latter-day Saints (the Mormon Church), who recognize Moroni as an archangel. Mormons believe that Moroni revealed information that restored Christianity to its fullness, which they believe had been lost in time between Jesus Christ's biblical ministry and when Moroni appeared to prophet Joseph Smith in the 1820s. Moroni was a person who became an angel, according to Mormon doctrine. As a person, Moroni lived somewhere in the Americas during the 4th century A.D. as part of a group of people called the Nephites. He and his father (the prophet Mormon) used golden plates to record what they said were divine revelations to add to the Bible, and Moroni buried those plates before he died in battle. As an angel, Moroni appeared to Joseph Smith several times beginning in 1823, directing Smith to the location in western New York where the plates were buried and helping Smith translate them. Smith, who founded the Church of Jesus Christ of Latter-day Saints, published his translations as the Book of Mormon.
In art, Moroni is often depicted blowing a trumpet, which symbolizes his role announcing revelations about the church. Many Church of Jesus Christ of Latter-day Saints temples feature statues of Moroni blowing a trumpet. The statues are gold because the plates that Moroni showed Joseph Smith and helped him translate were gold.
Role in Religious Texts:
Mormons believe that the Bible refers to Moroni in Revelation 14:6: "Then I saw another angel flying in midair, and he had the eternal gospel to proclaim to those who live on the earth -- to every nation, tribe, language and people." In the Book of Mormon, Moroni gives his testimony of faith, and concludes it in chapter 10 verses 33 and 34 by writing: "...if ye by the grace of God are perfect in Christ, and deny not his power, then are ye sanctified in Christ by the grace of God, through the shedding of the blood of Christ, which is in the covenant of the Father unto the remission of your sins, that ye become holy, without spot. And now I bid unto all, farewell. I soon go to rest in the paradise of God, until my spirit and body shall again reunite, and I am brought forth triumphant through the air, to meet you before the pleasing bar of the great Jehovah, the Eternal Judge of both quick and dead. Amen."
Other Religious Roles:
Besides revealing the location of the golden plates to Joseph Smith and helping Smith translate them, Moroni also appeared to some other people to encourage them to expand the new Church of Jesus Christ of Latter-day Saints. For example, early Mormons Oliver Cowdery, David Whitmer, and Martin Harris reported that they saw Moroni during visions.