The elder sister of David Bowes-Lyon married a prince who was the last Emperor of what country?
George VI George VI (Albert Frederick Arthur George; 14 December 1895 – 6 February 1952) was King of the United Kingdom and the Dominions of the British Commonwealth from 11 December 1936 until his death. He was the last Emperor of India and the first Head of the Commonwealth.
Princess Laurentien of the Netherlands Princess Laurentien of the Netherlands (née "Petra Laurentien Brinkhorst"; born 25 May 1966) is the wife of Prince Constantijn and sister-in-law of King Willem-Alexander and Queen Máxima.