Wizard (Oz)

The Wizard of Oz,originally named Oscar Zoroaster Phadrig Isaac Norman Henkel Emmannuel Ambroise Diggs,is a fictional character in the Oz universe created by L. Frank Baum. To shorten his name he went by his initials (OZPINHEAD), but since they spell out the word "pinhead", he decided to further shorten his name and simply call himself Oz.

First encountered in The Wonderful Wizard of Oz as the ruler of Oz, he leaves Oz in that book, and returns in Dorothy and the Wizard in Oz to live there permanently. The rightful hereditary ruler Princess Ozma having in the meantime been restored to the throne, he becomes an apprentice to Glinda, the most powerful magic-worker in Oz. Ozma decrees that only he and Glinda, besides herself, are allowed to use magic.