François-Séraphin Régnier-Desmarais (died 1713), French ecclesiastic, grammarian, diplomat and poet in French, Spanish and Latin
François-Séraphin Régnier-Desmarais (born 1632), French ecclesiastic, grammarian, diplomat and poet in French, Spanish and Latin
Paul Desmarais (born 1927), Canadian billionaire and CEO of the Power Corporation of Canada
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France Chrétien Desmarais, Canadian lawyer and businesswoman, daughter of Jean Chrétien and wife of André Desmarais
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Pierre DesMarais, Canadian politician and Chairman of Montreal's Executive Committee 1954-1957
Sérigny is close to French President Nicolas Sarkozy, heads numerous companies, and a member of the board of directors of Imerys, a mining company partially owned by a subsidiary of the Power Corporation of Canada and majority owned by the Desmarais family and tycoon Albert Frère, the richest man in Belgium who was involved in the UN Oil-for-Food scandal.