Gianfrancesco Penni
Born in Florence to a family of weavers, Penni entered Raphael's workshop very early in his life, and collaborated with him on several works, including the famous Rooms of the Vatican Palace, as well as the frescoes of Villa Farnesina, both in Rome. Heinrich Wölfflin and some other writers credited him with the entire execution of the Raphael Cartoons, with Raphael only creating the initial design, though more recent writers believe Raphael did much of the work himself.
Tommaso Vincidor
He was the pupil of Raphael, whom he helped in the execution of the famous Raphael Cartoons. Vincidor is further said to have been one of those pupils of Raphael who carried out the frescoes in the Vatican Loggia under his direction. On Raphael's death in 1520 he traveled to Flanders. At Antwerp he formed a friendship with Albrecht Dürer (1521); the German master painted his portrait, and refers to him in his Journal under the name of "Thomas Polonais". Later details of the life of Tommaso are vague and scanty. He entered the service of Henry of Nassau at Breda, and was employed in reconstructive and decorative work at the Castle there, and died in the Netherlands in 1536.