Canadian citizenship by descent

It may be timely for some Americans to claim Canadian citizenship by descent based on ancestors two or three generations back. But in this piece, as in others I’ve seen, it’s mentioned that “Between 1840 and 1930, close to one million French‑speaking Canadians […] emigrated to the United States in a mass migration movement…”

But it wasn’t only francophones who left. Two of my great‑grandfather’s sisters, Catherine and Mary Ryan, married here then moved to different parts of the United States in the 1880s, where they both had big families. Their numerous descendants now have Canadian rights they may not even know they have. My great‑great‑aunts and their husbands can’t have been the only anglophone Quebecers who saw a brighter future south of the border.