The parents of Susannah Bolling Arrington were Edmund/Edward Bolling/ Bowling of Maryland and Elizabeth Braggs, also of Maryland.
Bolling Family Association has some very interesting research on the migration of Arringtons, Bollings, other Maryland & Georgia families led by "John Cartwight who was also Edward Bolling Arrington's step-father.
The Bolling Family Association Newsletter (Vol. XXIII, August 2014 Issue) spelled it out wonderfully, along with some citations from the the Arrington Family Historian, Professor John Mitchell Arrington, in this reprint available at https://dcms.lds.org/delivery/DeliveryManagerServlet?dps_pid=IE6226310
John Mitchell Arrington says that "The writing of the enclosed article published in the Bolling Family Newsletter, Susannah Ann Bolling Arrington: Pioneer Wifeand Mother, was motivated by a driving quest in the search for my ancestors and the truth about their lives". He was dismayed by the Ancestry.com trees that connected Susannah to wrong parentages in an attempt to connect her and the Arringtons to the Virginian "Red Bollings".
He says that the latest research (2014) has proven that Susannah Ann Bolling "was the descendant of the St. Mary’s, Maryland Bowlings who had migrated to Amherst County Virginia in 1770 and settled in the Rose’s Mill area near the Tye River (now Nelson County, Virginia). Susannah Bolling, daughter of Edmund/Edward Bolling of Maryland, married John Arrington a year ( 1796 ) after their settlement in Amherst, Virginia. Her father, Edward Bolling, held the "surety". On the original surety bond, John Mitchell Arrington notes that Edward Bolling is "Edward Bowling (as spelled on her marriage bond)" .
As for Bolling DNA studies, I would get in touch with this group for further information. To have a test kit sent to you write Larry Bowling, Group Administrator for the BFADNA study at larrybow1ing1@gmai1.com or 3126 S. Longleaf Way, Boise, ID 83716.http://wwwfamilytreedna.com/public/Bolling/default.aspx?section=results
Btw, if you are related to Arringtons, you are in for a real treat, with John Mitchell Arrington's research - ABSALOM ARRINGTON: Virginia Pioneer Georgia Patriarch A Narrative ofArrington History - Virginia to Georgia 1650-2014. Also available online at https://dcms.lds.org/delivery/DeliveryManagerServlet?dps_pid=IE6226285