(1) On Extremism in our Time | Martin Plas - Academia.edu

Long but interesting.  References to the novel begin halfway through page 5.

Johann Adam Weishaupt (6 February 1748 - 18 November 1830[1][2][3][4]) was a German philosopher and founder of the Order of the Illuminati, a secret society.
Adam Weishaupt - Wikipedia, the free encyclopedia

in The Prague Cemetary, Weishaupt is the great uncle of Babette, whose existence i have been unable to confirm.

Don't send a psychopath to do a sociopath's work.

Bogaard History Part II

Vintras is mentioned several times in Eco's novel but does not appear as a character.  His views were apparently similar to those of Abbe Boullon who seems to have been mentored by him.  Boulon (Boullon) is featured in the above article.

Carmelnet: The Triumph of Humility: a translation by John Russell, O.Carm. and Helen Bailey - The Play

Diana Vaughan is mentioned in scene 3 of St. Therese ol Liseaux's play which is briefly mentioned in Eco's novel

Devil Worship in France: Chapter VIII. Dealings With Diana

Diana reappears in Eco's novel (chapter 22) as Diana Vaughan, no longer a case, but a living person whom Simonini  meets and ...... (no spoiler alert).

Léo Taxil - Wikipedia, the free encyclopedia

In the novel, Simonini contacts him to learn the "truth." about the Masons.

Taxil hoax - Wikipedia, the free encyclopedia

More on "Leo Taxil."

Putnam's Magazine: Original Papers on Literature, Science, Art, and National ... - Google BooksThis nun and her confessor appear on page 230 on Eco's novel.  Simonini is ordered to spy on the Abbe.  I have no idea what this will lead to.  References to Lilith and Samael hint that they might be secret Jews ( Read more... )

Archangel and Demon, he plays a minor role in the anti-Semitic "mythology' in the novel.  I take him to be a sort of male counterpart to Lilith.  Because a nun and priest have mentioned him, the French secret police have asked Simonini to spy on the priest ( Read more... )