Philip

Phillip was a talking Narnian horse who lived during the Golden Age of Narnia. He was used by Edmund Pevensie as a mount, both when he was practicing at Aslan's camp, and at the hunting of the White Stag. Phillip had a sense of sarcastic humour.

Edmund: "Woah horsey!"

Phillip: "My name is Phillip."

Phillip continued to serve the kings and queens of Narnia, staying as Edmund's personal steed till the day the Pevensies were swept back to Earth.

Trivia

 * It may have been a coincidence, but "Philip" means lover of horses.