Yet several of the people on the list say they will not be speaking at the event, and in some cases weren’t even contacted about speaking there. Among them is Charles Murray, the scholar at the center of a fracas in March at Middlebury College that left a professor injured.

“The inclusion of my name in the list of speakers was done without my knowledge or permission,” Mr. Murray wrote in an email to The Chronicle. “I will add that I would never under any circumstances appear at an event that included Milo Yiannopoulos.”

Asked why he wouldn’t appear with him, Mr. Murray said: “Because he is a despicable asshole.”