Your story is interesting, but I do not see any primary evidence to support it.Many Vawter/Vaughter slaves took the name as required by law to have a surname.Those that stayed with the families and worked many times took the same surname.The Watts lineage is traced by many generations, but I do not have the connection to Edmund Watts nor his color.The children I have for Benjamin Silas and wife are listed below.We would need to find each of them in the 1910 or 1920 census and show color to form an opinion.I am not up on the laws of this time as I work generally before 1850 and have only a slight knowledge that there were laws against racial marriages.That he was a prominent man would lead to questions?I would love to hear more of your research, I have found slaves in the 1870 census named Vorter, Vanter and Vautor that took that name following the civil war.Keep me posted.Georgene Benjamin Silas Vawter b. 28 Aug 1831 Bent Creek, VA d. 5 Jan 1910 Washington, DC m. Sarah Watts, daughter of Edmund Watt and Lucy Davis.Benjamin Silas Vawter was a doctor and was educated at the Univ. of VA and in Philadelphia. Children:Edmund Silas Vawter b. Aug 1874, Nelson Co., VA;Lucy Elizabeth Vawter b. 14 Sep 1875 d. age one, Alice Louis Vawter b. 17 Nov 1876 d. Jul 1878, Annie Vawter b. 15 Mar 1878 , George Henderson Vawter b. 16 Jul 1880, David Doggett Vawter b. 19 Mar 1882, Abraham Benjamin Vawter b. 27 Jun 1884 d. 25 Jun 1893 Washington, DC and Enoch Marvin Vawter b. 5 Apr 1888.