Adria (river)
Adria (Greek: Ἀδρίας) was a former channel of the Po delta passing by Adria that ceased in the 1st century BC.
This river was mentioned by Hecataeus, by Theopompus and by Ptolemy.
Hecataeus asserts that the Adriatic sea and the town of Adria were named after this river.
Read more about Adria (river): History