THIS ANSWER IS IN TWO PARTS (Part 1)
Familysearch.org (FS) has the following information available which I hope may be of use
Benjamin Vaughan FS ID KLQ7-LWT born 29 January 1805 Dinwiddie County, Virginia – died 4 November 1883 Hardeman, Tennessee - burial Walnut Grove Cemetery, Bolivar, Hardeman, Tennessee, United States
Spouse Giney Hamilton FS ID KC7L-NSK born between 1810 & 1815 Kentucky died before 1834
Benjamin & Giney were married 16 April 1831 Hardeman, Tennessee, United States & were the parents of 1 girl.
Benjamin’s parents
FATHER: John Vaughan FS ID GSDG-6TH born 1775 North Carolina, United States – died 1860 Bolivar, Hardeman, Tennessee, United States
MOTHER: Jane Phillips FS ID GSDG-PL4 born 1784 South Carolina, United States – died 1850 Hardeman, Tennessee, United States
John & Jane were married about 1805 in North Caroline and were the parents of 3 children.
Parents & Grand Parents of John Vaughan
FATHER: William Patrick Vaughan Sr. FS ID LRD9-8HX born 22 September 1750 Tretower, Breconshire, Wales, United Kingdom – died 5 May 1840 Hindsville, Madison, Arkansas, United States
William & his spouse Fereby Benton were married in 1772 Sweetens Cove, Marion, Tennessee, United States
According to these records they had 25 children, if this is true – POOR Lady
Grand Father: John Abraham Vaughan FS ID LB96-MKC born 3 March 1722 Tretower, Breconshire, Wales – died 4 January 1796 Madison, Arkansas, United States
G/Grand Father: Nicholas Vaughn Sr FS ID MVC3-VSG born 1683 Prince George, Virginia, British Colonial America – died 9 December 1738 Amelia, Virginia, British Colonial America
GG/Grand Father: William Vaughn IFS ID LHJ1-LPY born 1626 Charles City, Virginia, British America – died 1684 Charles City, Virginia, British America
GGG/Grand Father: John William Vaughan FS ID GS2Y-XDM born 1596 Rye, Sussex, England – died 16 May 1667 Charles City, Charles City, Virginia, British America
GGGG/Grand Father Hywel Fychan ap Gruffydd ap Hywel FS ID LHTX-MW6 born 1560 Merionethshire, Wales – died 1639 Dolgelley, Merionethshire, Wales
GGGGG/Grand Father Gruffydd ap Hywel FS ID LTTD-RZL born 1533 Dolgelly, Merionethshire, Wales – died 4 May 1603 Nannau, Merionethshire, Wales