Ok, so this is very interesting:
"The white, limestone caves of Zamak Spayenya hide many primitive paintings from a forgotten era. Most depict hunting scenes that feature stylised animals, including bear, elk, deer, and horses; but these animals are not hunted by men: they are hunted by great, winged centaurs.
Some Kislevite scholars believe these to be the Scythian people that once inhabited the oblast, but others bitterly argue against this. Instead, they claim the Scythians were Humans who used centaurs as a metaphor to show man and horse were inseparable, and wings to signify galloping at great speed."
The Scythians are one of the two tribes that created the "Ogham Stones" (the supporting henge networks made by humans in the Waystone network) alognside the Belthani. In DL, the Kurgan say they are the inheritors of the Scythians and we don't know if it's because of conquest or something else. The Roppsmen and Gospodar also say they're descended from them but we don't know much about that, and the Roppsmen are mostly absorbed by the Ungol at this point.
They also apparently have depictions of winged centaurs, and they're depicted in a manner that seems to be positive, so I doubt they were representing Centigors.
