Epona

In Celtic mythology, Epona was the goddess of horses, donkeys, mules, oxen, springs, rivers and cattle. She was also a psychopomp, accompanying souls to the land of the dead.

When Rome conquered Gaul, Epona's cult was adopted by the army, which called her Bubona.

In art, she was depicted with a cornucopia, sitting side-saddle on a horse or laying on one, or standing around multiple horses.