Κάσιον, ὄρος καὶ πόλις Αἰγύπτου πρὸς τῷ Πηλουσίῳ. ἐκλήθη δὲ ἀπὸ τῆς Κυκλάδος νήσου ἢ ἀπὸ Κάσου τοῦ Κλεόχου, ἀφ´ οὗ καὶ Κασίου Διὸς ἱερόν. ὁ πολίτης Κασιώτης ὡς Πηλουσιώτης, καὶ θηλυκὸν Κασιῶτις, καὶ τὸ κτητικὸν Κασιωτικός, ἀφ´ οὗ ἐν τῇ συνηθείᾳ τὰ Κασιωτικὰ ἱμάτια.
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' (as in 'Pelousiotes') and the feminine is 'Kasiotis'. The possessive is 'Kasiotikos', as per the 'Kasiotic' cloaks in the common tongue.