Hun, Alan, Avar, and other Steppe Nomad Movements

[Flavivs Aetivs]

Yes, the Romans called everything in the Pontic, Caspian, and Aral region a "Scythian" and later, after the Huns collapsed, they referred to the oncoming turks as "Huns."

Still, the Huns are a seeming mystery outside of their first appearance c.a. 250 (as suggested by Maenchen-Helfen) as the Vurugundi. After that we know the Alpilcurs were at the forefront of the events around 370 (it should be noted they were not united, obviously), but most Huns were still in the area of the Aral Sea and the Caspian sea from the period between 250 and 370. Do the Chinese/Persians/etc allude to any nomad confederations in the Caspain/Aral Sea region in this timeframe? I think the Yan-Cai (Alans) were mentioned around there in the 3rd century.