The proposed relationship of Antonia Lewandowski as the mother of Stanislaw Peter Bieniewicz and Rumalda Martha Bieniewicz is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a distant cousin relationship between RLB (a descendant of the Rumalda Martha Bieniewicz ancestral line) and NB (a descendant of the Stanislaw Peter Bieniewicz ancestral line) with a shared segment of 63.55 cM across 4 HIR segments.

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