The proposed relationship of Charlotte Justine Glander as the mother of Bertha Christine Wilhelmine Radke and Johanna Auguste Mathilde Radtke is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a 2nd cousin, twice removed relationship between CS (a descendant of the Johanna Auguste Mathilde Radtke ancestral line) and HJS (a descendant of the Bertha Christine Wilhelmine Radke ancestral line) with a shared segment of 151.10 cM across 3 HIR segments.

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