The proposed relationship of John Thomazin BIRD as the father of Betsy BIRD and Frederick Bird is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a 3rd cousin, twice removed relationship between JA (a descendant of the Betsy BIRD ancestral line) and SW (a descendant of the Frederick Bird ancestral line) with a shared segment of 56.02 cM across 4 HIR segments.

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