The proposed relationship of Wilhemine Augusta Grade as the mother of
Hilda Chrispens and
William Grade Chrispens is supported by DNA evidence indicating shared ancestry within the family lines.
Specifically, DNA evidence confirms a 2nd cousin, twice removed relationship between TM (a descendant of the William Grade Chrispens ancestral line) and AF (a descendant of the Hilda Chrispens ancestral line) with 76.82 cM of shared DNA across 4 HIR segments.
This match is consistent with their placement within these shared ancestral branches.