Prince William of Gloucester, was the elder son of Prince Henry, Duke of Gloucester, and a grandson of King George V. As the elder son, Prince William was heir to his father's dukedom of Gloucester but he was killed while piloting a plane in a competition two years before his father's death.

As a grandchild of a sovereign, the Duke bears the royal arms differenced by a label of five points, alternately red lions and St.George's Crosses. His coronet contains alternate crosses patée and strawberry leaves.

Full name: William Henry Andrew Frederick of Windsor

Style: HRH Prince William of Gloucester

Formal title: prince of the United Kingdom (from birth)

Born: 18 December 1941, at Hadley Common, Barnet, Hertfordshire

Died: 28 August 1972, at Halfpenny Green, Staffordshire

Unmarried