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 a shared segment of 37.96 cM across 3 HIR segments.

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