The proposed relationship of Celinda Ellen Gray as the mother of Waverly Oren Upton and SEU is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a distant cousin relationship between TT (a descendant of the SEU ancestral line) and SRB (a descendant of the Waverly Oren Upton ancestral line) with a shared segment of 68.52 cM across 2 HIR segments.

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