Princess Diana, the former wife of Prince Charles, would be called Diana, Princess of Wales.
This title reflects her status as a member of the British Royal Family and her marriage to the Prince of Wales. Following her divorce from Prince Charles, she retained the title "Princess of Wales" as a courtesy title.
While she was also known by her maiden name, Diana Spencer, it was less commonly used in reference to her royal status.
It's important to note that the title "Princess Diana" is technically incorrect. The correct title is "Diana, Princess of Wales".
However, the name "Princess Diana" became a popular and familiar way to refer to her, especially after her tragic death in 1997.
