Hello Thomas, I do research on the Bondurant family, and I have some information that may be helpful to you, but please be aware that this is not my direct line, so much of my data come from secondary sources and need to be double checked.Thomas N. Bondurant, according to the 1900 census, was born Apr 1872 in IL.He married about 1893 a woman with the first name of Randell.She was born, according to the census, Feb 1876 in MN.They had 2 children - Frank Earl b. 13 Apr 1889 or 1894 and Carle N. (female) b. Mar 1899.You can find them in the 1900 census in Bloom Twp., Chicago Heights, Cook Co., IL.T. N. Bondurent is listed as a foreman engineer who had been married for 7 years.I was not able to locate any of these folks in 1910, so I suspect that T. N. and Randell either divorced or she died.Thomas shows up in 1920 in Detroit as a widower working as a fireman in an auto factory, but in the 1930 census of Detroit he is listed as divorced.Frank Earl appears in the WW I draft registration.He was living in 1917 in Thornton, Cook Co., IL, reporting that he was born 13 Apr 1889 in Momence, IL.He was supporting a wife.He appears in 1920 in Thornton with a wife named Mamie (maiden name possibly Singer).In 1930 they were living in Chicago Heights, Cook Co., IL.He was a steam engineer in a steel mill.His wife's name in that census was Mayne.Thomas N. Bondurant was the son of Samuel Tharp Bondurant and Sarah Ellen Barnett, as you noted.Thomas had a sister named Mary Emma who m. 27 Sep 1889 Edward Co., IL Charles K. Handley, but I have little information about them.Samuel Tharp Bondurant was the son of Joseph Bondurant b. 15 Sep 1801 Bedford Co., VA d. 30 Apr 1864 Sangamon Co., IL and Martha Tharp b. 2 Nov 1805 Boone Co., KY d. 15 or 25 Aug 1892 Deland, Piatt Co., IL.They married 16 Oct 1823 Boone Co., KY and had 11 children.Joseph was the son of Thomas Bondurant b. abt 1770 d. 1839 Boone Co., KY and his wife Margaret Drury b. 1767 d. 1851 Boone Co., KY.They married 26 Jan 1792 Bedford Co., VA and had 9 children.If you can discover who Thomas' father was, you will have answered a question that has burned in the hearts of a number of researchers for a very long time.No one has yet been able to confirm the line of descent although all are in agreement that Thomas was a descendant (i.e., great-grandson probably) of Jean Pierre Bondurant, the original immigrant from France.I hope this has been helpful.