January 17, 1827 - June 27, 1844
The first of Smith's wives, Emma Hale, gave birth to nine children during their marriage, five of whom died before the age of two. The eldest, Alvin (born in 1828), died within hours of birth, as did twins Thaddeus and Louisa (born in 1831). When the twins died, the Smiths adopted another set of twins, Julia and Joseph, whose mother had recently died in childbirth; Joseph died of measles in 1832. In 1841, Don Carlos, who had been born a year earlier, died of malaria. In 1842, Emma gave birth to a stillborn son. Joseph and Emma had four sons who lived to maturity: Joseph Smith III, Frederick Granger Williams Smith, Alexander Hale Smith, and David Hyrum Smith. Some historians have speculated—based on journal entries and family stories—that Smith may have fathered children with his plural wives. However, all DNA testing of potential Smith descendants from wives other than Emma has been negative.
Throughout her life, Emma Smith frequently denied that her husband had ever taken additional wives. Emma said that the very first time she ever became aware of a polygamy revelation being attributed to Smith by Mormons was when she read about it in Orson Pratt's periodical The Seer in 1853. Emma campaigned publicly against polygamy, and was the main signatory of a petition in 1842, with a thousand female signatures, denying that Smith was connected with polygamy. As president of the Ladies' Relief Society, Emma authorized publishing a certificate in the same year denouncing polygamy, and denying her husband as its creator or participant. Even on her deathbed, Emma denied Joseph's involvement with polygamy, stating, "No such thing as polygamy, or spiritual wifery, was taught, publicly or privately, before my husband's death, that I have now, or ever had any knowledge of ... He had no other wife but me; nor did he to my knowledge ever have".
After Smith's death, Emma Smith quickly became alienated from Brigham Young and the church leadership. Young, whom Emma feared and despised, was suspicious of her desire to preserve the family's assets from inclusion with those of the church, and thought she would be even more troublesome because she openly opposed plural marriage. When most Latter Day Saints moved west, she stayed in Nauvoo, married a non-Mormon, Major Lewis C. Bidamon, and withdrew from religion until 1860, when she affiliated with the Reorganized Church of Jesus Christ of Latter Day Saints, first headed by her son, Joseph Smith III. Emma never denied Smith's prophetic gift or repudiated her belief in the authenticity of the Book of Mormon.