Both specific of Caserta, Abategiovanni of the area between Trentola-ducenta (CE) and Lusciano (CE), Abbategiovanni as well as that area is also specific to Naples, should derive from Abate Giovanni, that is an abbot, probably Orthodox, named Giovanni , or as a direct descendant or as an indirect link (those of the abbot Giovanni).
Buy a heraldic document with your coat of arms
You may be interested
Verba Volant, Scripta Manent