Lewis & Short

Ăbella, ae, f., a town in Campania, near Nolu, abounding in fruit-trees and nuts, now Avella, Sil. 8, 545: malifera, Verg. A. 7, 740.
Hence, Abellāna nux or Avellana, also Abellina, the filbert, Plin. 15, 22, 24, § 88; and Abellani, the inhabitants of Abella, Just. 20, 1.