Wilhelmine Ernestine Grade (1860 - 1930)

The proposed relationship of Wilhelmine Ernestine Grade as the mother of Otto Gustav Radke, Herbert Drefs, Lydia Drefs, Emilie Radke and Gustav Radke is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a distant cousin relationship between VK (a descendant of the Otto Gustav Radke ancestral line) and FD (a descendant of the Herbert Drefs ancestral line) with a shared segment of 210.92 cM across 10 HIR segments.

It also confirms a 2nd cousin, twice removed relationship between TVH (a descendant of the Lydia Drefs ancestral line) and JR (a descendant of the Otto Gustav Radke ancestral line) with a shared segment of 123.35 cM across 6 HIR segments.

It also confirms a 2nd cousin, once removed relationship between GP2 (a descendant of the Emilie Radke ancestral line) and LK (a descendant of the Otto Gustav Radke ancestral line) with a shared segment of 215.96 cM across 9 HIR segments.

It also confirms a 2nd cousin, once removed relationship between LK (a descendant of the Otto Gustav Radke ancestral line) and SH2 (a descendant of the Gustav Radke ancestral line) with a shared segment of 210.92 cM across 11 HIR segments.

It also confirms a distant cousin relationship between TVH (a descendant of the Lydia Drefs ancestral line) and MR2 (a descendant of the Gustav Radke ancestral line) with a shared segment of 69.91 cM across 3 HIR segments.

These matches are consistent with their placement within these shared ancestral branches.

Further support for shared ancestry within Otto Gustav Radke, Herbert Drefs, Lydia Drefs, Emilie Radke and Gustav Radke is provided by an additional 37 DNA confirmed relationships among other tested descendants tracing back to these lines.

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