Petronilla Tovo (Turin, 19th century) was an Italian painter, specializing in painting miniatures on ivory. She is known for portraits of the Duke and Duchess d'Aosta; Prince Tommaso; Prince of Carignano; and the two sons of Duke of Aosta; and portrait of a young woman in antique and modern costume. She also painted landscapes and still lifes, and at the 1880 Turin Exposition, she exhibited Vaso con fiori and two landscapes[1] She is likely related to Emanuele Tovo.