RI stands for Rex Imperator (or if the monarch is a Queen, Regina Imperatrix) The title was used to denote the monarch as King-Emperor (of the British Empire) or Queen-Empress.
Their Majesties King George VI Queen Elizabeth, The Queen Mother
All British Monarchs named George were related to George VI.
George VI
George VI succeeded Edward VIII (abdicated).
George VI, Edward VIII and George VI
George VI of Georgia died in 1313.
George VI of Imereti died in 1722.
Neville Chamberlain was Prime Minister and King George VI was monarch.
George VI or on coins sometimes in Latin as Georgius VI or Georgivs VI
The cast of The Coronation of King George VI - 1937 includes: King George VI as himself
The future shall determine if there will be a George VII. If you mean George VI: it was Elizabeth Bowes-Lyon, the famous Queen Mum.
King George VI ruled the United Kingdom.