The maternal relationship between Joyce Carol Newman and her DNA tested daughter JS is confirmed by the direct inheritance path of autosomal DNA.
The segmental (via DNA segment triangulation) and total DNA shared between JS and other confirmed descendants of
Johan Erik Olofsson Nyman/
Sofia Serafia Utterström is consistent with the expected ranges for their respective relationships. Since JS descends from Johan Erik Olofsson Nyman/Sofia Serafia Utterström through Joyce Carol Newman, the presence of significant shared DNA between JS and other known descendants of Johan Erik Olofsson Nyman/Sofia Serafia Utterström validates the generational links along this maternal line.
This supports the conclusion that DNA was passed from MRCA couple Johan Erik Olofsson Nyman/Sofia Serafia Utterström through Joyce Carol Newman to JS, confirming this direct ancestral connection through multiple generations.