BRY´LLION(Βρύλλιον: Eth. Βρυλλιανός;Steph. s. v.), a city on the Propontis in Bithynia. Stephanus reports that it was Cius, according to Ephorus, by which he probably means that Bryllium was the old name of Cius. There was a district Bryllis which contained the small town of Dascyleium. Pliny (Plin. Nat. 5.32) mentions Bryllium, which he evidently takes to be a different place from Cius, but near to it.
[G.L]