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.
Raphael
From 1517 until his death, Raphael lived in the Palazzo Caprini in the Borgo, in rather grand style in a palace designed by Bramante. He never married, but in 1514 became engaged to Maria Bibbiena, Cardinal Medici Bibbiena's niece; he seems to have been talked into this by his friend the Cardinal, and his lack of enthusiasm seems to be shown by the marriage not having taken place before she died in 1520. He is said to have had many affairs, but a permanent fixture in his life in Rome was "La Fornarina", Margherita Luti, the daughter of a baker ("fornaro") named Francesco Luti from Siena who lived at Via del Governo Vecchio. He was made a "Groom of the Chamber" of the Pope, which gave him status at court and an additional income, and also a knight of the Papal Order of the Golden Spur. Vasari claims he had toyed with the ambition of becoming a Cardinal, perhaps after some encouragement from Leo, which also may account for his delaying his marriage.