What Name Will William Take King?

Could Prince William be King Philip? Often monarchs who have chosen different regnal names have chosen one of their existing middle names. So Prince William could choose Philip as his regnal name in tribute to his grandfather, making him the first British King Philip in history.

What will William be called when King?

Currently known as the Duchess of Cambridge, when William becomes next in line to the throne, his title will automatically change to Prince of Wales, the title historically held by those first in line.

What title will William and Kate have when Charles becomes king?

Duchess of Cornwall: William will also likely become Duke of Cornwall when Charles becomes king, as it's also traditionally granted to the heir apparent. This would make Kate the new Duchess of Cornwall, a title that is currently held by Charles's wife Camilla.