Stephanos of Byzantium - Ethnika
'Iaon' and 'Ieon'; and there is the verb 'iaonizo', from which comes the adverb 'iaonisti'. 'Ian' is from 'Iaon'. It is also said in the feminine as 'Ias' and 'Iaonis'.
AI translation — gpt-5.5; Gabe v3
Stephanos excerpt (left) is aligned with matched Herodian passages (right). Colors indicate corresponding overlap spans.