Stephanos of Byzantium - Ethnika
Nakolia: a city of Phrygia. Strabo book 12. The name is also neuter, derived from Nakolē the nymph; and just as from “nymph” comes Nymphaion and from Hēra comes Hēraion, so from Nakolē comes Nakolaion. The ethnic is Nakolaius. But if the form is Nakoleia with a diphthong, from Nakolos, son of Daskylos, the ethnic will be Nakoleus, just as from Seleukos comes Seleukeus.
Stephanos excerpt (left) is aligned with matched Herodian passages (right). Colors indicate corresponding overlap spans.