Trachonitis was a rugged region northeast of the Sea of Galilee known for its volcanic terrain. In the New Testament it formed part of the territory governed by Philip, son of Herod the Great.
Luke identifies Philip as tetrarch of Iturea and Trachonitis when establishing the political setting at the beginning of the ministry of John the Baptist.
The ancient region corresponds broadly to the volcanic landscape of the Leja in southern modern Syria, although administrative boundaries varied over time.
Trachonitis appears explicitly in Luke's chronological introduction to the ministry of John the Baptist.
Luke states that in the fifteenth year of Tiberius Caesar, Pontius Pilate governed Judea, Herod Antipas ruled Galilee, and his brother Philip was tetrarch of the region of Iturea and Trachonitis.
The reference situates the Gospel narrative within the political geography that emerged after the death of Herod the Great and the division of his territories among his heirs.
The name Trachonitis derives from Greek terminology describing rugged or rocky terrain and was applied to a volcanic region east and northeast of the Sea of Galilee.
The area contained difficult terrain formed by ancient lava flows and became known historically as a refuge for groups that were difficult for surrounding governments to control.
Herod the Great acquired authority over the region, and after his death it became part of the tetrarchy of his son Philip.
Roman administrative arrangements in the wider region changed repeatedly during the first and second centuries AD.
Ancient Trachonitis is generally associated with the volcanic region known as the Leja in southern Syria.
The historical administrative territory was not necessarily identical to the boundaries of the modern geographical district.
AVWJ should therefore represent Trachonitis as a regional area rather than as a single city or precisely fixed modern boundary.