Harry reportedly considered but ultimately rejected the idea of using Princess Diana's family name, after being told it would be logistically difficult..

Prince Harry asked his uncle Charles Spencer about the idea of changing his family's last name, which would mean dropping the royal family's Mountbatten-Windsor surname, PEOPLE understands

According to The Daily Mail, The Duke Of Sussex went to Earl Spencer, Princess Diana’s brother, for advice on the matter during a brief UK trip. Harry allegedly explored the idea of swapping out his surname for his mother’s - changing Mountbatten-Windsor to Spencer.