Because his farther was king.
Edward VIII gave up the throne on 11 December 1936.
18
Edward VIII in 1936.
England and Ireland
Edward VIII
To get a son as heir to the throne
Douglas MacArthur
King Henry VIII succeeded to the English throne in 1509 upon the death of his father, King Henry VII.
A son, who would be the indisputable heir of the throne.
He died a natural if painful death in 1547.
George VI, Edward VIII and George VI
Came to throne when his father Henry VII died.