Board Thread:The Reference Desk/@comment-4139960-20130925182903/@comment-26975268-20130926010958

Ding, ding, ding, ding, ding! I've found a goldmine!! We now have a source for her last name, and for her marriage to Charles.
 * "Sometimes Yates spent hours looking at the objects: a pair of soccer boots, a mug celebrating the marriage of Prince Charles and Lady Diana Spencer..." (PROSE: Prisoners of the Sun)

I've also tried a few different keywords. Again, I do not have a complete collection, but it's pretty expansive by this point. I've even started getting Bennys! Here's some more quotes:
 * "The next woman Benny recognised was either Mystic Meg or Lady Di (Benny always got them mixed up)." (PROSE: The Dying Days)
 * Evelyn: "But you know what I really want to do? I want to write to John Smith and tell him to watch his health next year, I want to send a message to Lady Di and tell her to never, ever go to Paris again. Or find a way to stop Habyarimana's assassination and save millions and millions of lives being wasted. But I can't." (PROSE: Instruments of Darkness)
 * ''In the real world, she died in Paris. It's not explicitly stated, but it's implied here.

That's only prose. I don't own any comics (because I don't get the magazines), and audios are not exactly searchable. I recall a short reference to a royal wedding in The Eternal Summer, but it was not specified whose. Considering that it must have been between 1950 and 2009, all points to Charles and Diana. But of course, this is real world speculation.