Botticelli

... was born Alessandro di Mariano di Vanni Filipepi, around 1445.

According to Wikipedia, "The nickname Botticelli, meaning 'little barrel', derives from the nickname of Sandro's brother, Giovanni, who was called Botticello apparently because of his round stature. A document of 1470 refers to Sandro as 'Sandro Mariano Botticelli', meaning that he had fully adopted the name.