Simplify the following text for a Grade 8 native English-speaking person.
Original: Prince Henry of Wales ( Henry Charles Albert David ; born 15 September 1984 ) , commonly known as Prince Harry , is the younger son of Charles , Prince of Wales and the late Diana , Princess of Wales , and grandson of Queen Elizabeth II and Prince Philip , Duke of Edinburgh .
Simplified: Prince Henry Charles Albert David of Wales ( always known as Prince Harry ) ( born 15 September 1984 ) is the son of Charles , Prince of Wales and the late Diana , Princess of Wales .