The maternal relationship between Rose De Lima Messier and her son
Theodore Tetreault is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant BM.
The segmental (via DNA segment triangulation) and total DNA shared between BM and other confirmed descendants of
Pierre Patenaude/
Catherine Brunet dit Belhumeur is consistent with the expected ranges for their respective relationships. Since BM descends from Pierre Patenaude/Catherine Brunet dit Belhumeur through Rose De Lima Messier and her son Theodore Tetreault, the presence of significant shared DNA between BM and other known descendants of Pierre Patenaude/Catherine Brunet dit Belhumeur validates the generational links along this maternal line.
This supports the conclusion that DNA was passed from MRCA couple Pierre Patenaude/Catherine Brunet dit Belhumeur through Rose De Lima Messier to Theodore Tetreault, and ultimately to BM, confirming this direct ancestral connection through multiple generations.