Eudoxus of Cnidus
Both Pliny the Elder ("Natural History" book iv) and Jordanes recognised the "Sar-" and "Sauro-" elements as interchangeable variants, referring to the same people. Greek authors of the fourth century (Pseudo-Scylax, Eudoxus of Cnidus) mention "Syrmatae" as the name of a people living at the Don, perhaps reflecting the ethnonym as it was pronounced in the final phase of Sarmatian culture.