Claim: Giovanni Antonio da Brescia was an Italian engraver who used north Italian spelling for his initials, began to use formulae in 1507 and signed  prints more fully.
Evidence: Giovanni Antonio da Brescia was an Italian engraver of northern Italy, active in the approximate period 1490–1519, during the Italian Renaissance. In his early career he used the initials "Z.A." to sign some twenty engravings, and until recently Zoan Andrea was regarded as a distinct printmaker; it is now realized that they are the same person, and the "Z.A." stood for Giovanni Antonio, "Zovanni" being a north Italian spelling. Around 1507 he began to use formulae such as "IO.AN.BX. ", and signed some prints more fully.