BONONIA, in Ancient Geography, a town of Gallia Belgica, supposed to be the Portus Iccius of Cæsar, and the Gessoriacum of Mela, and to have had three different names (Cluverius). Peutinger's map expressly calls Gessoriacum Bononia. Now Bologna. E. Long. 1. 30. N. Lat. 50. 40.