ABONA, or ABONIS, in Ancient Geography, a town and river of Albion. The town, according to Camden, is Abingdon; and the river, Abhon or Avon. But by Antonine's Itinerary, the distance is nine miles from the Venta Silurum, or Caer-went; others, therefore, take the town to be Porshut, at the mouth of the river Avon, near Bristol. Abhon or Avon, in the Celtic language, denotes a river.