What is Prince Philip's last name?

Prince Philip's surname is Mountbatten. He was born on 10 June 1921 to parents Prince Andrew of Greece and Denmark and Princess Alice of Battenberg. During World War I, his family changed their name from Battenberg to Mountbatten to separate themselves from the German name.

At birth he was: His Royal Highness Prince Philip of Greece and Denmark. After his marriage to the Queen he became: His Royal Highness The Prince Philip, Duke of Edinburgh.