Sarmatians:

As with the Cimmerians and with the Scythians, so with the Sarmatians, their past comes to us sealed in a shroud of murkiness. Some light is shed on that past however, as they are first mentioned in first century AD Roman literature (referred to there as Alans?). Old Roman maps point to them and the areas of their occupation interchangeably as either Alans (Josephus 7.4.3; 7.7.4) or Geloni (Herodotus). Ptolemaic maps are said to reference those same areas as Sarmatia. Another source document detailing something of the presence and reach of this people is an ancient Parthian manuscript known as the Vologeses Inscription, while one of the richest sources of knowledge is the many graves, ...