Aidyn Chronicles: The First Mage (2001)

In a universe with two places, the spirit plane (the source of magic) and the mundane plane (where mortals live), once a person discovers their magical true name, they are able to unite their spirit and mundane forms, thereby unlocking unlimited power. Aidyn Chronicles: The First Mage follows a young squire named Alaron who discovers his true magical name. (Wikipedia)