Marianne de Bellem (6 October 1767 - 17 December 1798) was a revolutionary and pastellist from the Austrian Netherlands.
This claims that she was the mistress of Pierre van Eupen, and that by 1787 she and her mother had been encouraged by the latter's lover, Hendrik Van der Noot, to distribute revolutionary pamphlets in the streets of Brussels calling for an insurrection against the Austrians.
Her artistic activities are attested to in a number of letters between her mother and Van der Noot in which Jeanne thanks him for providing pastels for her daughter.
A June 28, 1791 letter from Rotterdam, to which city the women had fled, was published in the Nouvelles extraordinaires de divers endroits on July 5 and states that Marianne has taken up painting pastels and miniatures as a way of providing an income.
No works are traced, but the stage directions for Act IV of De Beaunoir's play direct that the walls should be decorated with "postures choisies de l’Aretin, dessinés au pastel par Mariane".