Plural Marriage in Our Family

Heinrich "Henry" Reiser (b. 1832 in Strahlegg, Switzerland)
married
1. Susanna Rupp 14 June 1856. They had no children.
2. Magdalena Schneider 9 May 1861 in Salt Lake City, UT. They had 7 children.
3. Catharina Anna Auer 16 Feb 1866 in Salt Lake City, UT. They had 8 children.
Susanna Rupp Reiser died 1 Jan 1874.
4. Margaretha von Bergen 26 July 1875 in Salt Lake City, UT. They had 8 children.
5. Annie Impey. They had 1 child.
Magdalena Schneider Reiser died 3 Aug 1893 in Salt Lake City, UT.
Henry Reiser died 29 Aug 1904 in Salt Lake City, UT.
Margaretha von Bergen Reiser died 19 Nov 1928 in San Jose, CA and was buried in Salt Lake City, UT.
Catharina Anna Auer Reiser died 1 April 1930 in Salt Lake City, UT.
Annie Impey Reiser died 3 March 1934 in Salt Lake City.

Samuel Hamer, Jr. (b. 1831 in Bolton, Lancashire, England)
married
1. Ann Albion 5 Nov 1857 in Salt Lake City, UT. They had 1 child.
2. Sarah Openshaw 11 July 1870 in Salt Lake City, UT. They had 8 children.
Samuel Hamer, Jr. died 8 Feb 1895 in Salt Lake City, UT.
Sarah Openshaw Hamer died 30 Jan 1927 in Salt Lake City, UT.
Although we don't have the date of Ann Albion Hamer's death, this appears to be a plural marriage, because the first child of both wives was born in June and August 1871 respectively.

William Cameron (b. 1808 in St. John's, New Brunswick, Canada)
married
1. Mary Edwards 5 May 1829 in St. John's, New Brunswick, Canada. They had no children.
2. Jane Frances Lint 23 Aug 1837 in St. John's, New Brunswick, Canada. They had 12 children.
It doesn't appear that these were plural marriages, because the dates were so early and the first marriage apparently produced no children.