Origin of the name William: From the Old Norman French Willaume, which is derived from the Old High German Willehelm, a compound name composed from the elements willeo (will, determination) and helm (protection, helmet): hence, "resolute protector." William is the most popular name introduced to England by the Normans.
The name William is a German baby name. In German the meaning of the name William is: Resolute protector; will. For a long time after the Norman conquest in A.D. 1066 many English boys were given some form of William the Conquer's name. ... The firstborn son of Prince Charles is named William.
