Stella de’ Tolomei (died 1419), was an Italian courtier and royal mistress. She was the official royal mistress of Niccolò III d'Este, Marquis of Ferrara for many years and the mother of several of his acknowledged illegitimate children. Issue * Ugo d'Este (1405–1425). Executed by his father on 21 May 1425 for allegedly having an affair with his stepmother Parisina Malatesta * Leonello d'Este (1407–1450). * Borso d'Este (1413–1471).