Alceste Anastasie Hortense Cœuriot, also known under the stage name Madame Ismaël, (born 1823 in Amsterdam, The Netherlands; died 1893 in Colombes, France) was a French operatic mezzo-soprano. Her professional career ran from 1850 to 1888 under the last name Ismaël, which was her husband Jean-Vital Jammes' stage name, and she would keep the stage name even after their divorce in 1860. Throughout her onstage roles, she mostly portrayed roles of comic old women, "duègne" roles, or "Dugazon" roles, which were of young mothers and women past youth.