The proposed relationship of Eva Elizabeth Riland as the mother of Robert Graham Jr. Wagner and Pamela Anne Wagner is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a 1st cousin, twice removed relationship between CCC (a descendant of the Robert Graham Jr. Wagner ancestral line) and NW (a descendant of the Pamela Anne Wagner ancestral line) with a shared segment of 213.22 cM across 11 HIR segments.

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