Prince Philip. The late Queen Mother was not a royal princess by birth, while Prince Philip’s parents were. His mother Princess Alice of Battenberg descended from the royal houses of Wurttemberg, the UK and Hesse, while his father Prince Andrew of Greece and Denmark descended from Graeco - Danish (King George I of the Hellenes, son of Christian IX of Denmark) and Russian royal families (his mother Queen Olga had been born Grand Duchess Olga Romanova of Russia).
So, dynastically, the Queen contracted an equal marriage to a royal prince, while her father King-Emperor George VI married a commoner. (Even though a daughter of an Earl, the Queen Mother was technically a commer, as under British law, only title holders are truly members of the nobility).
