Thomas Martin Seslar III was born in 1829 in Clinton, Summit, Ohio, USA as the second child of Thomas Martin Seslar II and Jane Hibben. He had five siblings, namely: Mary Elizabeth, Martha, William H, Sarah Ann, and Samual. He died on 08 Dec 1876 in Bath, Allen, Ohio, USA. When he was 21, He married Elizabeth Mahalla Aldridge,daughter of Samuel Aldridge and Sarah Bragg, in 1850 in Bloomington, Ohio.

Thomas Martin Seslar III was buried in Bridgeport, Morrill, Nebraska, USA (Oregon Trail Memorial Park Cemetery).

Thomas Martin Seslar III and Elizabeth Mahalla Aldridge had the following children:

Laura Emily Seslar was born on 09 Sep 1854 in Bloomington, Clinton, Ohio, USA. She died on 22 Apr 1935 in Northport, Morrill, Nebraska, USA. She married Charles Ezra Edgar Young in Apr 1872.
George Alexander Seslar was born on 12 Mar 1856 in Lima, Allen, Ohio, USA. He died on 27 Jan 1932 in Northport, Morrill, Nebraska, USA. He married Florence Belle Pooler on 23 Dec 1888.
Sarah Jane Seslar was born on 12 Jun 1857 in Lima, Allen, Ohio, USA. She died on 17 Apr 1937 in Bridgeport, Morrill, Nebraska, USA. She married Charles Elliott Logan on 08 Dec 1888.
Virginia Adaline Seslar was born on 19 Oct 1859 in Bloomington, Clinton, Ohio. She died on 09 Sep 1916 in Bridgeport, Morrill, Nebraska, USA. She married George Benjamin Kushmaul on 18 Dec 1876.
Mary Margaret Seslar was born on 19 Jun 1860 in Bloomington, Clinton, Ohio, USA. She died in Jan 1913 in Camp Clark, Morrill, Nebraska, USA. She married John Henry Patton in 1880 in Ohio, USA.
William Telphir Seslar was born on 19 Jun 1862 in Bloomington, Clinton, Ohio, USA. He died in 1948. He married Addie Angier about 1886.
Charles Milton Seslar was born on 18 Jul 1863 in Ohio, USA. He died on 30 Mar 1904 in Bridgeport, Morrill, Nebraska, USA. He married Helena VeronaYochem on 04 Nov 1896 in Sidney, Cheyenne, Nebraska, USA.
Rosa Bell Seslar was born on 18 Oct 1866 in Lima, Allen, Ohio, USA. She died on 23 Mar 1928. She married John Broomfield on 19 Dec 1888 in Chicago, Cook, Illinois, USA.
John Baldwin Seslar was born on 18 Sep 1867. He died on 23 Jun 1930. He married Caroline E Miller between 1884–1914.
Susan Arwilda Seslar was born on 16 Jun 1869 in Lima, Allen, Ohio, USA. She died on 20 Jan 1954 in Houston, Harris, Texas, USA. She married Elliott Hiram Bisby on 27 Feb 1889 in Chicago, Cook, Illinois, USA.