The proposed relationship of Johann Sawatzky as the father of
Johann J. Sawatzky and
David J. Sawatzky is supported by DNA evidence indicating shared ancestry within the family lines.
Specifically, DNA evidence confirms a 2nd cousin, once removed relationship between JS (a descendant of the David J. Sawatzky ancestral line) and DJK (a descendant of the Johann J. Sawatzky ancestral line) with 108.10 cM of shared DNA across 8 HIR segments.
This match is consistent with their placement within these shared ancestral branches.