Fernande Hortense Cécile de Mertens (9 May 1850 - 24 January 1924) was a Belgian-French painter.

[1] Hélène Échinard writes that in Marseille, Fernande attended the École des Beaux-Arts where she was taught by Théodore Jourdan and Dominique Antoine Magaud.

[2] The couple had a dedicated studio at the Boulevard de la Corderie in Marseille, where she taught the use of pastel – a popular technique at the time for young girls of respected background.

Although her father Edouard and his three brothers had a total of fourteen children among them, there were no grandchildren for the Mertens nobility; the last known bearer of the name and title died in 1926, not long after Fernande's own death.

Her works have been exhibited in multiple salons, including Nîmes, Montpellier, Lyon, Niort, Draguignan, Aix-en-Provence, and her hometown Marseille.