The origin and legend can be tracked down all the way to Proto-Indo-European mythology and it has been added and evolved to present day variations.
Werewolf or lycanthrope (from Ancient Greek λυκάνθρωπος lukánthropos (from λύκος lúkos “wolf” and ἄνθρωπος, ánthrōpos “human”) , sometimes refereed as therianthropic hybrid (the ability to shapeshift into an animal), is typically referred to interpretation of the Germanic and Balkan representations in spite of its more ancient origins.