are placed by Pliny in Aquitania (4.100.19).
He says, “Aquitani, unde nomen provinciae, Sediboniates. Mox in oppidum contributi Convenae, Begerri.” The Begerri are the Bigerriones of Caesar. [BIGERRIONES
] We have no means of judging of the position of the Sediboniates except from what Pliny says, who seems to place them near the Bigerriones and Convenae. [CONVENAE