(Κάσιος), a surname of Zeus, derived from amount Casion not far from Pelusium, on which the god had a temple. (Strab. xvi. p.760; Plin. Nat. 4.20, 5.14.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890