Stephanos of Byzantium - Ethnika
Nakoleia: a city in Phrygia. Strabo, book 12. The name is neuter, after Nakole, a nymph. And just as 'nymphaion' is from 'nymphe' and 'Heraion' from 'Hera', so 'Nakolaion' is from 'Nakole'. The ethnonym is 'Nakolaieus'. But if the form is 'Nakoleia', with a diphthong, deriving from 'Nakolos', the son of Daskylos, the ethnonym will be 'Nakoleus', as 'Seleukeus' is from 'Seleukos'.
Stephanos excerpt (left) is aligned with matched Herodian passages (right). Colors indicate corresponding overlap spans.