Stephanos of Byzantium - Ethnika
Agathyrna: a city in Sicily, as per Polybius, book 9. The ethnonym is 'Agathyrnaios', for this formation is not unusual among the inhabitants of Sicily: they also say 'Himeraios', 'Ennaios', and 'Katanaios'.
AI translation — gpt-5.6-sol; Gabe v3
Stephanos excerpt (left) is aligned with matched Herodian passages (right). Colors indicate corresponding overlap spans.