Marie Jeanne Isabelle de Guise d'Armagnac

Isabelle, Princesse de Conti (Marie Jeanne Isabelle de Savoie de Condé; née de Guise d'Armagnc, Mademoiselle de Guise) was the wife of Louis-Joseph, Prince de Condé. By birth, Isabelle was a member of the esteemed Guise d'Armagnac family (commonly known as simply "Guise"). By marriage, she was a Savoie de Condé, and therefore a princesse du sang.