He ascended the throne to become George VI after the abdication of his elder brother, Edward. Named after his grandfather - Queen Victoria's husband - Prince Albert, Albert Frederick Arthur George was King of the United Kingdom and the Dominions of the British Commonwealth from 1936 to 1952. He was the last Emperor of India and the first Head of the Commonwealth.
His full title was His Majesty Farouk I, by the grace of God, King of Egypt and the Sudan, Sovereign of Nubia, of Kordofan and of Darfur. He was overthrown in the 1952 military coup d'état and forced to abdicate in favour of his infant son Ahmed Fuad, who succeeded him as Fuad II. He died in exile in Italy in 1965.
Fayṣal al-Awwal ibn al-Ḥusayn ibn ‘Alī al-Hāshimī was King of the Arab Kingdom of Syria for a few months in 1920 until the monarchy was abolished, and was appointed King of Iraq from 1921 to 1933 by the British government partly on the recommendation of Lawrence of Arabia whom he met during WWI and partly because of his conciliatory attitude towards encouraging a pan-Arab nationalism.
King Bhumibol the Great was the ninth monarch of Thailand from the Chakri dynasty as Rama IX. Reigning since 1946 he was, at the time of his death in October 2016, the world's longest-serving head of state, the longest-reigning monarch in Thai history and the longest-serving monarch having reigned only as an adult, serving for 70 years, 126 days. A one year period of mourning was announced with a royal cremation ceremony to be held later this month.
Four Kings for the letter K for Sunday Stamps II