The proposed relationship of Edith Cora Swartzlander as the mother of Richard D. Streeter and RS is supported by DNA evidence indicating shared ancestry within the family lines.

Specifically, DNA evidence confirms a great aunt / uncle relationship between BS (a descendant of the RS ancestral line) and KV (a descendant of the Richard D. Streeter ancestral line) with a shared segment of 976.92 cM .

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