The Achaei were an ancient people of Scythia, mentioned by Strabo (11.2, together with the Zygoi, Heniochi, and Cercetae and Macropogones) and by Pliny (4.26.2).
Pliny mentions a Portus Achaeorum at the mouths of the Danube.
The name has been interpreted to mean "river dwellers", from an Indo-European word for "water" (Latin aqua, Old High German aha; Wissowa, Pauly's Real-Encyclopadie s. v. Achaei)
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