Stephanos of Byzantium - Ethnika
Kasion: a mountain and city in Egypt near Pelousion. It was named after the Cycladic island, or after Kasos son of Kleochos, after whom the sanctuary of Zeus 'Kasios' is too. A citizen is a 'Kasiotes' and the feminine is 'Kasiotis'. The possessive is 'Kasiotikos', from which come the 'Kasiotic' cloaks in the common tongue.
Stephanos excerpt (left) is aligned with matched Herodian passages (right). Colors indicate corresponding overlap spans.