Even more interesting is the origin of the LDS moniker.
Joseph's church was originally incorporated in 1830 as the Church of Christ. In 1834, the name was changed to The Church of the Latter Day Saints, a title put forth by Sidney Rigdon. In 1838, following the schism caused by disastrous Kirtland Safety Society adventure, threatened by legal action for misappropriating their name by the Saints remaining in Ohio, the name was again changed as per Rigdon's suggestion to The Church of Jesus Christ of Latter Day Saints.
Following Joseph's death in a blotched jailbreak and the ensuing Succession Crisis, James Strang and many of Joseph's early members split off and organized their own church in Wisconsin, Illinois and Michigan. They took the name with them and were the first to properly register it. A brief legal battle followed and as a compromise, the Utah Mormons changed the name yet again by inserting the hyphen.
Ol' Joe was mighty tired and failed to hear GOD when he was told what to name his NEW CHURCH GROUP.