Francesco d'Ubertino Verdi, called Bachiacca. He is also known as Francesco Ubertini, il Bacchiacca. He was an Italian painter of the Renaissance whose work is characteristic of the Florentine Mannerist style. In 1540, Bachiacca became an artist at the court of Duke Cosimo I de' Medici (reg. 1537-1574) and Duchess Eleanor of Toledo. In this capacity, Bachiacca was a colleague and peer of the most important Florentine artists of the age, including Pontormo, Bronzino, Francesco Salviati, Tribolo, Benvenuto Cellini, Baccio Bandinelli, and his in-law, the sculptor Giovanni Battista del Tasso.
I love how everyone's face is a wee bit off here. Gives a me a pleasantly uneasy impression.