From birth name: This is a redirect from a person's birth name to a more common name or a related topic. Use this rcat to tag mainspace redirects when the title matches the subject's name given to them at birth. If the redirect is a personal name that differs from the birth name, then use {{R from personal name}} instead. In either case, be sure to include {{DEFAULTSORT:,}} for correct category sorting of this person's name.

https://en.wikipedia.org/wiki/Diana_Spencer