The proposed relationship of John Sheehy as the father of John J Sheehy and Hanora Sheehy is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a 2nd Cousin, Once Removed relationship between MFF (a descendant of the John J Sheehy ancestral line) and MF (a descendant of the Hanora Sheehy ancestral line), with a shared segment of 10.62 cM across 1 HIR segments. This match is consistent with their placement within these shared ancestral branches.