The Frentani were an Italic tribe occupying the tract on the east coast of the peninsula from the Apennines to the Adriatic, and from the frontiers of Apulia to those of the Marrucini. They were bounded on the west by the Samnites, with whom they were closely connected, and from whom they were originally descended. Hence Scylax assigns the whole of this line of coast, from the frontiers of Apulia to those of Picenum, to the Samnites. Their exact limits are less clearly defined, and there is considerable discrepancy in the statements of ancient geographers: Larinum, with its territory (extending from the Tifernus (modern Biferno) to the Frento), being by some writers termed a city of the Frentani, while the more general opinion included it in Apulia, and thus made the river Tifernus (Biferno) the limit of the two countries. The northern boundary of the Frentani is equally uncertain; both Strabo and Ptolemy concur in fixing it at the river Sagrus (modern Sangro), while Pliny extends their limits as far as the Aternus, and, according to Mela, they possessed the mouths both of that river and the Matrinus. The latter statement is certainly inaccurate; and Strabo distinctly tells us that the Marrucini held the right bank of the Aternus down to its mouth, while the Vestini possessed the left bank; hence, the former people must have intervened between the Frentani and the mouth of the Aternus. Pliny's account is, however, nearer the truth than that of Strabo and Ptolemy; for it is certain that Ortona and Anxanum (modern Lanciano), both of which are situated considerably to the north of the Sagrus, were Frentanian cities. The latter is indeed assigned by Ptolemy to that people, while Strabo also terms Ortona the port or naval station of the Frentani, but erroneously places it to the south of the river Sagrus. Hence, their confines must have approached within a few miles of the Aternus, though without actually abutting upon that river. On the west, they were probably not separated from the Samnites by any well-marked natural boundary, but occupied the lower slopes of the Apennines as well as the hilly country extending from thence to the sea, while the more lofty and central ridges of the mountains were included in Samnium.