Stephanos of Byzantium - Ethnika
Abrotonon: Lykos the Rhegian thinks it is a locality, but Strabo, in the seventeenth book, says it is a city, and so do others. It is a city of the Libyphoinikes. It is also called Neapolis, as per Ephoros. The ethnonym is not in common usage, but the technical art devises it by analogy. For as 'Athmoneus' is from 'Athmonon', 'Gargareus' from 'Gargaron', 'Sounieus' from 'Sounion', and 'Sigeieus', 'Ilieus', 'Leukonieus', 'Pantikapaieus', and 'Doulichieus', so too 'Abrotoneus'. The pattern of neuters sometimes has the ethnonym with 'ηνος', as 'Pergamenos' from 'Pergamon', unless it is from the feminine 'Pergamos', as 'Kyzikenos' from 'Kyzikos'. It is possible also to say that the ethnonym is from 'Abrotonos'. For there are many such cases, especially among the demes of the Athenians, as a deme-member from 'Oion' and from 'Kedai', as will be shown.
Stephanos excerpt (left) is aligned with matched Herodian passages (right). Colors indicate corresponding overlap spans.