The proposed relationship of John Cessna as the father of
John Cessna and
Jonathan Cessna is supported by DNA evidence indicating shared ancestry within the family lines.
Specifically, DNA evidence confirms a 5th cousin, twice removed relationship between KC (a descendant of the Jonathan Cessna ancestral line) and EO (a descendant of the John Cessna ancestral line) with 17.90 cM of shared DNA across 1 HIR segments.
This match is consistent with their placement within these shared ancestral branches.