You must mean Mary TEVIS (1788 - 1860+) who married Nathan MEFFORD (1790 - 1858) & had Julia Ann MEFFORD (ca. 1810, Mason Co., KY - 1859, Schuyler, MO) who m. Thomas Jefferson JACKSON (ca. 1805, KY - 10 Sep. 1870, Missouri City, Ft. Bend, TX).
Peter TEVIS m. ca. 1778, prob. Baltimore Co., MD, Catherine _. They had four children born in Maryland before they moved to Mason Co., KY, where Peter TEVIS bought land 30 June 1792. When Peter died, by 1802, the three youngest sons were apprenticed, T. Snowden & Isaiah to become blacksmiths, and Rowland, a hatter.
Ch:
Peter (ca. 1780 - 10 Jan. 1815, Detroit, War of 1812) m. 1 Sep. 1802, Jane PURCELL.
Noah (1 Feb. 1782 - 6 Dec. 1835, Beaumont, TX [a founder of Beaumont]) m. 24 July 1811, Nancy NIXON.
[Thomas] Snowden (1785 - 1830+, KY) m. 28 Je. 1808, Sarah Love PENDLETON
Mary "Polly" (ca. 1788 - 1860+, MO) m. 29 Jan. 1808, Nathan MEFFORD. [Will Bk. E, p. 1, Mason Co. Court House, Maysville, KY; marriage book A, p. 3, Lewis Co., Ct. House, Vanceburg, KY; 1860 census, Peno Twp., Pike Co., MO]
Isaiah (ca. 1792 - 1872, Mason Co., KY, testate) m. 2 Feb. 1825 or 12 Feb. 1826, Ann SMITH[ER]. Isaiah's will named a friend and the Methodist Episcopal Church, no relatives.
Rowland, b. 1793
Violet, b. ca. 1797, m. 28 Nov. 1818, Wm. CORNSTALK.
Ancestry.com : Thomas Jefferson JACKSON, b. ca. 1805, KY, was s/o Leroy JACKSON, b. ca. 1770, & Mary "Polly" COLEMAN [ca. 1770 - 1863], m. 22 Apr. 1790, Nelson, KY).,
Thomas m1. 2 Aug. 1827, Pike Co., Julian MIFFORD [Julia Ann MEFFORD], who d. 1859, & m2. 8 Oct. 1859, Mary Amanda TROXELL (1842 - 1920).
Mary M. BELL, 664 Roberts Circle, DeKalb, IL 60115, published "The Tevis Family," 2003.