MADAME is validvalid

madam [n MADAMES] / the French title of respect for a married woman [n MESDAMES]

23,461 of 196,601 in NWL2023·also valid in CSW24

(French) a title of respect for a married woman [n MADAMES or MESDAMES] / to address as madame [v MADAMED, MADAMING, MADAMES]