The proposed relationship of Johann Friedrich Krack as the father of
Adam Krack and
Johannes Krack is supported by DNA evidence indicating shared ancestry within the family lines.
Specifically, DNA evidence confirms a 3rd cousin, once removed relationship between JS (a descendant of the Johannes Krack ancestral line) and SG (a descendant of the Adam Krack ancestral line) with 37.96 cM of shared DNA across 3 HIR segments.
This match is consistent with their placement within these shared ancestral branches.