 In the early 20th century he was thought to be Francesco's father Leonello, based on similarities to the subject of a portrait of Pisanello.Leonello would have been around 42 at the time, and died from a cranial abscess the following year.At another the time the panel was titled "Portrait of a Goldsmith", presumably based on a misunderstanding of the significance of the hammer held in d'Este's right hand.