"In Old Iranian, Proto-Aryan s has become h. In old Persian an ethnic name Daha- is attested, also as a proper noun in the administrative tablets found at Persepolis; the masculine plural is used as the name of a province of the Persian empire, placed before the similarly used name of the Sakas in a Persepolis inscription of Xerxes (h 26). In the Greek sources Herodotus (1,125) is the first to mention the people called Daoi, as a nomadic tribe of the Persians. More accurate information on them , however, is delivered by Alexander's historians. According to Q. Curtius Rufus (8,3) and Ptolemy's Geography (6 ,10,2) , the Dahas lived on the lower course of the river Margos (modern Murghab) or.. in the northern steppe area of Margiana. Pomponius Mela (3,42), based on Eratosthenes, tells that the great bend of the river Oxus towards the northwest begins near the Dahas (juxta Dahas), Tacitus (Ann. 11,10) places the Dahae on the northern border of Areia, mentioning the river Sindes (modern Tejend) as the border. These placements agree neatly with that of Namazga V culture of Margiana and Bactria [in greater Iran]."