Centaur

The centaur (Κένταυρος) is a hybrid with the body of a horse and with the torso of a man extending where the horse's neck should be.

Source
Centaurs originate from greek mythology, dating back to around 500 BC. Noteable centaurs are Chiron (Χείρων), the teacher of Achilles, the couple Hylonome and Cyllarus, both died in a battle with Lapiths.

Media
Centaurs appear in the following media:

Books

 * The Chronicles of Narnia - by C.S. Lewis
 * Harry Potter - by J.K. Rowling
 * Percy Jackson & the Olympians - by Rick Riordan
 * The Centaur - by John Updike
 * Fablehaven - by Brandon Mull

Games

 * Age of Mythology
 * Gems of War
 * Heroes of Might and Magic
 * Heroes of Might and Magic II
 * Heroes of Might and Magic III
 * Heroes of Might and Magic IV
 * Heroes of Might and Magic V
 * Heroes of Might and Magic VI
 * Heroes of Might and Magic VII
 * Titan Quest
 * Heroes of Might and Magic
 * Heroes of Might and Magic II
 * Heroes of Might and Magic III
 * Heroes of Might and Magic IV
 * Heroes of Might and Magic V
 * Heroes of Might and Magic VI
 * Heroes of Might and Magic VII
 * Titan Quest
 * Titan Quest
 * Titan Quest
 * Titan Quest
 * Titan Quest

Movies and series

 * Fantasia - 1940, Walt Disney Studios, Centaurs appear in "The Pastoral Symphony"