The Reformed church of Jesus Christ of Latter
day Saints. RLDS is an offshoot of the official Mormon
church which split off after the death of Joseph Smith.
nowadays they prefer to use the title 'Community of Christ'
Brigham young took the official LDS
church to Utah where they carried on with their practice of Polygamy until about 1890
The smaller RLDS - along with Joseph Smith's wife - did not approve of Polygamy and has never practised it
not to be confused with FLDS which was a
later split - in Utah - of Mormons who wanted to carry on polygamy,y after the 1890 official LDS ban