The proposed relationship of John A Brogan as the father of Melinda Brogan and RB is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a distant cousin relationship between TA (a descendant of the Melinda Brogan ancestral line) and SS (a descendant of the RB ancestral line) with a shared segment of 35.78 cM .

This match is consistent with their placement within these shared ancestral branches.