The proposed relationship of Sarah Ann Buck as the mother of
Robert Washington Brashers and
Jacob R Brashears is supported by DNA evidence indicating shared ancestry within the family lines.
Specifically, DNA evidence confirms a distant cousin relationship between JS (a descendant of the Jacob R Brashears ancestral line) and CL (a descendant of the Robert Washington Brashers ancestral line) with 35.98 cM of shared DNA across 1 HIR segments.
This match is consistent with their placement within these shared ancestral branches.