He was also known as Pomponio Amidano, in part because he is either confused with or was a pupil of Pomponio Allegri; others claim he was a pupil of Francesco Mazzola (Parmigianino).
He is alternatively referred to as Pomponio Amidano, which can be attributed to either a mix-up with Pomponio Allegri or his being a student of Francesco Mazzola (Parmigianino). Some believe he was also taught by this artist.