Cloudbirth was a Centaur who lived in Narnia during the late reign of Caspian X and the early reign of Rilian.
As a Centaur he had knowledge of the healing properties of herbs and plants, and thus was considered a famous healer among the Narnians.
After Puddleglum's foot was burned in the Lady of the Green Kirtle's kingdom, Cloudbirth healed it when Puddleglum, Rilian, Eustace and Jill returned to the upper-world.