The maternal relationship between Gurli Granstrom and her son GP is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant JP.

The segmental (via DNA segment triangulation) and total DNA shared between JP and other confirmed descendants of Frank Granstrom/Ida Amanda Nyman is consistent with the expected ranges for their respective relationships. Since JP descends from Frank Granstrom/Ida Amanda Nyman through Gurli Granstrom and her son GP, the presence of significant shared DNA between JP and other known descendants of Frank Granstrom/Ida Amanda Nyman validates the generational links along this maternal line.

This supports the conclusion that DNA was passed from MRCA couple Frank Granstrom/Ida Amanda Nyman through Gurli Granstrom to GP, and ultimately to JP, confirming this direct ancestral connection through multiple generations.