The maternal relationship between Gladys Mearl Coulson and her son Ronald Dean Person is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant JL.

The segmental (via DNA segment triangulation) and total DNA shared between JL and other confirmed descendants of John Waddill/Delilah Phillips is consistent with the expected ranges for their respective relationships. Since JL descends from John Waddill/Delilah Phillips through Gladys Mearl Coulson and her son Ronald Dean Person, the presence of significant shared DNA between JL and other known descendants of John Waddill/Delilah Phillips validates the generational links along this maternal line.

This supports the conclusion that DNA was passed from MRCA couple John Waddill/Delilah Phillips through Gladys Mearl Coulson to Ronald Dean Person, and ultimately to JL, confirming this direct ancestral connection through multiple generations.