The information I have on William Ewell Black: born 18 Jan 1814 died 20 Nov 1843 in SC. He married Nancy Dunlap.
Father: John Black born about 1778 Charleston, VA. died about 1835. Married 28 Dec 1804 Kaurens Co. SC. Mother: Sara "Sally" Conway Ewell born about 1785 SC died 15 Oct 1872 Laurens Co. SC.(another source gave death date as May 1858 in GA.) She was daughter of James Ewell born 1754 Lancaster Co. VA died 13 Apr 1797 Lancaster Co. VA. married Sara Ann Conway 7 Jul 1783 in Lancaster Co. VA.** will for James Ewell: Probated 15 May 1797, Will Book 28 Lancaster Co. VA.
Children of John Black and Sally Ewell were: 1 Trenmore Fingal Black 2 John Blair Black 3 Agatha Conway Black 4 Richard Oscar Black 5 William Ewell Black (1814-1843) 6 Elizabeth Jeanette Black 7 Malvina Harriett Black.
Children of William Ewell Black and Nancy Dunlap were: 1 William Dunlap Black born about 1835 died about 1907 married about 1859 to Nannie B. Hawkins.
Sara Conway Ewell Black had a brother named James Ewell. I have no further information on this family. Thank you for your reply to my post.