King Constantine II (born 2 June 1940) became King of the Hellenes (official name of Greece) on 6 March 1964 and was overthrown on 8 December 1974. He lives in exile in London
Just after King Constantine came to the throne, a Greek lady friend told me there is a tradition that the part of Turkey in Europe will be regained for Greece by a king who has 6 toes on his feet. According to her, King C. has that number of toes. Doesn't seem likely so far - perhaps it is hereditary.