Who dated Prince William of Gloucester?

Prince William of Gloucester (William Henry Andrew Frederick; 18 December 1941 – 28 August 1972) was a member of the British royal family. The elder son of Prince Henry, Duke of Gloucester, and Princess Alice, Duchess of Gloucester, he was a grandson of George V, nephew of Edward VIII and George VI, and first cousin of Elizabeth II. At birth, he was fourth in line to the throne; by the time of his death, he was ninth. A graduate of Cambridge and Stanford, he joined the Foreign and Commonwealth Office, serving in Lagos and Tokyo before returning to undertake royal duties.

He was the most recent descendant of George III to be diagnosed with porphyria, a condition thought to have caused George III’s mental breakdown, and in William’s case, it was most likely hereditary. William died in 1972, aged 30, in an air crash while piloting his plane during a competition.