The maternal relationship between Barbara Ellen Richmond and her DNA tested daughter TA is confirmed by the direct inheritance path of autosomal DNA.
The segmental (via DNA segment triangulation) and total DNA shared between TA and other confirmed descendants of
John A Brogan/EB is consistent with the expected ranges for their respective relationships. Since TA descends from John A Brogan/EB through Barbara Ellen Richmond, the presence of significant shared DNA between TA and other known descendants of John A Brogan/EB validates the generational links along this maternal line.
This supports the conclusion that DNA was passed from MRCA couple John A Brogan/EB through Barbara Ellen Richmond to TA, confirming this direct ancestral connection through multiple generations.