The proposed relationship of Rebecca Knight as the mother of Rebecca Adams and Mary Pettingill Adams is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a 1st Cousin, Once Removed relationship between KLJ (a descendant of the Rebecca Adams ancestral line) and LC (a descendant of the Rebecca Adams ancestral line), with a shared segment of 525.59 cM across 17 HIR segments. This match is consistent with their placement within these shared ancestral branches.

Further support for shared ancestry within the Rebecca Adams and Rebecca Adams lines is provided by an additional 2 DNA-confirmed relationships among other tested descendants tracing back to these lines.

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