The proposed relationship of Irene Ida Henderson as the mother of Paula Irene Lamme and John Walter Lamme is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a 1st cousin, once removed relationship between JL (a descendant of the John Walter Lamme ancestral line) and DB (a descendant of the Paula Irene Lamme ancestral line) with a shared segment of 483.61 cM across 22 HIR segments.

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