Henry Charles Albert David (aka Prince Harry).
Henry Charles Albert David or Prince Harry for short
Prince Harry
Prince William's brother is Prince Henry Charles Albert David better known as Prince Harry.
Prince William has one younger brother - Prince Harry.
No, but Prince William has one brother.
Prince William has one brother, Prince Harry.
No, Prince William only has one brother, Prince Harry.
Prince William has one younger brother, Harry.
Prince William's best man is his younger brother, Prince Harry.
None, but he has a brother, Prince Harry.
Prince William doesn't have a sister, just a brother, Harry
The Best Man at the Royal Wedding of Prince William & Kate Middleton was Prince Harry, Prince William's brother.
No, just a brother Harry.