The proposed relationship of Homer Dale Day as the father of PMD and CMD is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a distant cousin relationship between AD (a descendant of the PMD ancestral line) and LMC (a descendant of the CMD ancestral line) with a shared segment of 339.18 cM across 12 HIR segments.

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