The term 'Son of Elizabeth II' refers to two members of the British Royal Family, Prince CHARLES and Prince ANDREW. Prince CHARLES is the eldest son of Queen Elizabeth II and Prince Philip, Duke of Edinburgh, and is currently the heir apparent to the British throne. Prince ANDREW is the second son of Queen Elizabeth II and Prince Philip, Duke of Edinburgh. Both Prince CHARLES and Prince ANDREW are grandsons of King George VI and Queen Elizabeth The Queen Mother.