The maternal relationship between Anna Elsa Lundberg and her son Johan Oskar Sandquist is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant AI.

The segmental (via DNA segment triangulation) and total DNA shared between AI and other confirmed descendants of Olof Sundell/Dordi Nilsdotter is consistent with the expected ranges for their respective relationships. Since AI descends from Olof Sundell/Dordi Nilsdotter through Anna Elsa Lundberg and her son Johan Oskar Sandquist, the presence of significant shared DNA between AI and other known descendants of Olof Sundell/Dordi Nilsdotter validates the generational links along this maternal line.

This supports the conclusion that DNA was passed from MRCA couple Olof Sundell/Dordi Nilsdotter through Anna Elsa Lundberg to Johan Oskar Sandquist, and ultimately to AI, confirming this direct ancestral connection through multiple generations.