Prince William of Gloucester (William Henry Andrew Frederick; 18 December 1941 - 28 August 1972) was a member of the British royal family, a grandson of George V.

Early life
After graduating in 1963, he spent a post-baccalaureate year at Stanford University studying political science, American history, and business. Upon returning to Britain, he took a position with Lazards, a merchant bank.
Prince William was the second member of the British Royal Family to work in the civil service or the diplomatic service (the first was his late uncle, Prince George, Duke of Kent in the 1920s). He joined the Foreign and Commonwealth Office in 1965 and was posted to Lagos as the third secretary to the British High Commission. In 1968, he transferred to Tokyo to accept the post of second secretary (commercial) in the British Embassy. In 1970, the Duke of Gloucester's health began to fail and he was diagnosed as suffering from porphyria. Prince William resigned from the diplomatic service and returned to Britain. For the next two years, he managed Barnwell Manor and began to carry out public duties as a member of the royal family.
Prince William served on some occasions as Counsellor of State in the absence of his cousin, the Queen.

Career
A certified pilot, he owned several aircraft and competed in several air shows. He died when the plane he was piloting crashed at Halfpenny Green, near Wolverhampton. He was buried at Frogmore Royal Burial Ground. The comprehensive school in Oundle, which he opened in 1971, was renamed Prince William School in his memory.
Prince William was the heir-apparent of his father's peerages, Duke of Gloucester, Earl of Ulster, and Baron Culloden. Upon his death, his younger brother Prince Richard of Gloucester became heir-apparent and succeeded to these peerages in 1974.

Later life

Titles, styles, honours and arms

18 December 1941-28 August 1972: His Royal Highness Prince William of Gloucester