The proposed relationship of Wilhelmine Petzold as the mother of
Erwin Rohde and
William Fredrick Rohde is supported by DNA evidence indicating shared ancestry within the family lines.
Specifically, DNA evidence confirms a 2nd cousin, twice removed relationship between DS (a descendant of the Erwin Rohde ancestral line) and AR (a descendant of the William Fredrick Rohde ancestral line) with 77.34 cM of shared DNA across 5 HIR segments.
This match is consistent with their placement within these shared ancestral branches.