Various derivations are given by the ancient grammarians - one from the town of Aegae; another from Aegea, a queen of the Amazons who perished in this sea; and a third from Aegeus, the father of Theseus, who, supposing his son dead, drowned himself in it.
The name Rhine, which is apparently of Celtic origin, is of uncertain etymology, the most favoured derivations being either from der Rinnende (the flowing), or from Rein (the clear), the latter being now the more generally accepted.
The derivations of names may here be grouped into two classes, those having a commercial connexion, and those associated with ancient buildings, particularly the City wall and ecclesiastical foundations.
The etymology of the name (for which several derivations have been proposed) and the origin of the town are equally uncertain, and there is not a single monument of antiquarian interest upon which to found a conjecture.
Hence the first written accounts give Portuguese, Malay and other derivations, some of which have continued to find credence among quite recent writers.