Stephanos of Byzantium - Ethnika
Thebetha: a fortress in Mesopotamia. Arrian, book 11. The inhabitant is 'Thebethenos', just as 'Amathenos' is from Amatha.
AI translation — gpt-5.5; Gabe v3
Stephanos excerpt (left) is aligned with matched Herodian passages (right). Colors indicate corresponding overlap spans.