Greetings! I have that Joseph Dickerson Smith, the son of George Smith and Keziah Dickerson married Ann Gillum on 6 May 1799 in Albemarle County, VA with John Watson as bond. Ann was the daughter of John Gillum, Sr., and Elizabeth Dickerson. Elizabeth Dickerson and Keziah are sisters and daughters of John Dickerson.
I have that Joseph and Ann had a daughter Ann Smith who married Nathan Smith Gillum on 11 Apr 1837 in Howard County, MO.
The Sandridge Arnett family married into these lines. Another Sandridge, son of Lasley Arnett and Frances Smith married 2 May 1820, Unity D. Gillum, the daughter of James Gillum, Sr., and Susannah Smith.