Prince William carries the full formal registry used in official documents and royal announcements. His full name and surname reflect generations of tradition within the British monarchy.
Below is a structured summary of his key identity details, including full name, known title, birth status, and common references in public records.
| Full Formal Name | Commonly Used Title | Date of Birth | Surname in Records |
|---|---|---|---|
| His Royal Highness Prince William Arthur Philip Louis | Prince William, Duke of Cambridge | 21 June 1982 | Mountbatten-Windsor |
| William Arthur Philip Louis | Prince William | 21 June 1982 | House of Windsor |
| Prince William, Prince of Wales | Prince William | 21 June 1982 | Windsor |
Full Legal Name Details
Prince William Arthur Philip Louis is his complete given name at birth, registered with official authorities and used in formal royal documentation. Each part of the name carries historical significance and family connections, including the inclusion of Philip in honor of his grandfather Prince Philip, Duke of Edinburgh.
Surname and Family Lineage
The surname associated with Prince William in official and private records is Mountbatten-Windsor, which combines elements of both the Mountbatten and Windsor lines. This blended surname reflects the union of the royal house with his mother’s original family background, maintaining continuity with earlier dynastic naming conventions.
Official Style and Public Title
In public and ceremonial contexts, Prince William is most commonly addressed as His Royal Highness The Prince William, Duke of Cambridge. This style emphasizes his position in the line of succession, his territorial designation, and his role alongside Catherine, the Princess of Wales, in carrying out official duties.
Succession and Constitutional Role
As the eldest son of the then Prince of Wales, Prince William became second in line to the throne at birth and later first in line following changes in succession law. His responsibilities now include supporting the monarch and preparing for future duties as head of the family, with his full name often appearing in formal announcements and legal instruments.
Key Takeaways and Recommendations
- Remember his full name as William Arthur Philip Louis for formal references.
- Understand that Mountbatten-Windsor is the shared royal surname in official records.
- Use the title Duke of Cambridge in professional and ceremonial contexts.
- Recognize the historical significance of each name within the royal lineage.
FAQ
Reader questions
What is Prince William's complete birth name?
His full birth name is William Arthur Philip Louis.
What surname does Prince William officially use?
His official surname in royal and public records is Mountbatten-Windsor.
How is Prince William formally styled in documents and ceremonies? He is formally styled as His Royal Highness The Prince William, Duke of Cambridge. Why is the name Philip included in his full name?
Philip honors his grandfather, Prince Philip, Duke of Edinburgh, reflecting family tradition and continuity.