What Religion do they repersent?

The Huns Repersented Tengrism.

Tengrism- In Tengriism, the meaning of life is seen as living in harmony with the surrounding world. Tengriist believers view their existence as sustained by the eternal blue Sky, Tengri, the fertile Mother-Earth, spirit Eje, and a ruler who is regarded as the holy spirit of the Sky. Heaven, Earth, the spirits of nature and the ancestors provide every need and protect all humans. By living an upright and respectful life, a human being will keep his world in balance and maximize his personal power Wind Horse.