20th-century dukes of Cornwall

Charles III is King of the United Kingdom and 14 other Commonwealth realms.

George V was King of the United Kingdom and the British Dominions, and Emperor of India, from 6 May 1910 until his death in 1936.

Edward VIII, later known as the Duke of Windsor, was King of the United Kingdom and the British Dominions, and Emperor of India, from 20 January 1936 until his abdication in December of the same year.

Edward VII was King of the United Kingdom and the British Dominions, and Emperor of India, from 22 January 1901 until his death in 1910.