William A. Polk parents were John Polk(b.1785) and Elizabeth Ann Polk, both are buried in the Linn Flat Cemetery outside of Nacogdoches, TX. His grandfather was Charles (Civil Charley,) born January 18, 1760, and his grandmother was Margaret (Baxter) Polk. The POLK family seemed related to almost everyone who was anyone in deep east texas politics, as well as to national figures like President James K. Polk.

William A. Polk married Martha Amanda Barrett.

William A. Polk siblings are:
(a)Charles Grandison Polk b: 12 MAR 1811; Married Mary Ann Massey on Dec 28, 1837.(brother was William S.Massey).
(BOTH Wlliam A & his brother Charles listed above remained in TN, They did not migrate to TX with the rest of the family..
(c)Amanda M. Polk b: APR 1821; married Rev. Richard Overton Watkins. Rev R.O. Watkins was born near Murfreesboro, Tennessee, in 1816. His education was received at Shannon, Mississippi, and in Lebanon, Tennessee, and he entered the ministry of the Cumberland Presbyterian Church. For many years he was prominent as a pastor in Texas, and was stationed at different times at Austin and Waco. Mrs. Watkins died at Kemp, TX in 1912 at the age of ninety-two, having survived her husband for many years
(d)Emily B. Polk b: 25 FEB 1827; married Josiah Taylor Childers
(e)Victoria Elizabeth Polk b: 1839 TX, d.1867;(1st)marriage, William Birdwell on 21 Jan 1857 TX, d. before 1865. (2nd) marriage, Lafayette F. Branch on Jun 7, 1866 ,Nacogdoches County, TX: b. 17 Jan 1843 TN
(f)Nancy Allen Polk b.20 Feb 1833, d. 22 Feb 1897, Nacogdoches, TX; married Norman Bowditch Branch on Oct 4, 1853, in Nacogdoches County, TX; b. Jan 15, 1828 TN, d. Jun 30 1886, Nacogdoches County, TX

Shelby County TN Census 1850:
Household Gender Age
Wm A Polk M 36y
Martha Polk F 27y
Elizabeth Polk F 9y
Henrietta Polk F 7y
James Polk M 5y
John Polk M 3y
Henry Polk M 6m
Anthony Barrett M 23y
Rebecca Barrett F 21y
Dennis Dallas M 53y
.