James Bradley Thayer, b. 15 Jan 1831 in Haverhill, Essex County, Massachusetts, d. 14 Feb 1902 in Cambridge, Middlesex County, Massachusetts, son of Abijah Wyman Thayer & Susan Bradley. He married Sophia Bradford Ripley on April 24, 1861 in Concord, Middlesex County, Massachusetts.
James Cary Barrel Thayer, b. 10 Aug 1824 in Braintree, Orange County, Vermont, d. 18 Jun 1897 in Northfield, Washington County, Vermont, son of Samuel W. Thayer & Ruth Packard. He married Martha Jane Pratt (1st wife) on January 7, 1850. He married Lucretia M. Gregory (2nd wife) on June 29, 1871 in Northfield, Washington, Vermont.
Joel Thayer, b. 18 Jul 1812 in Ontario, Wayne County, New York, d. 19 May 1881 in Skaneateles, Onondaga County, New York, son of Amasa Thayer & Sally Trowbridge. He married Juliette Legg in 1835.
John Milton Thayer, b. 24 Jan 1820 in Bellingham, Norfolk County, Massachusetts, d. 19 Mar 1906 in Lincoln, Lancaster County, Nebraska, son of Elias Thayer & Ruth Staples. He married Mary Torrey Allen on December 27, 1842 in Sterling, Worcester County, Massachusetts.
Joseph Henry Thayer, b. 7 Nov 1828 in Boston, Suffolk County, Massachusetts, d. 26 Nov 1901 in Cambridge, Middlesex County, Massachusetts, son of Joseph Heyler Thayer & Martha Stevens Greenough. He married Martha Caldwell Davis on November 30, 1858 in Boston, Suffolk County, Massachusetts.