Amage (old name, new instance at a later time?)
In looking for more information on these people, I ran across catalogues of coins minted in Bosporus which bore Bosporan kings of Sarmatian descent with Iranian (Sarmatian) names, which gave me even more names to include:
Aspurgus (old name, new spelling)
I've also added these references to the reference list.
Additionally, Sulimirski's book is so important that I will be writing a post devoted solely to reviewing it once I finish reading it.
Sulimirski, T., 1970, The Sarmatians, vol. 73 of Ancient Peoples and Places, Praeger Publishers, Inc.