Dunn Hall was an easy decision. Classics professor Frederick Dunn, in the early 1920s, was the boss (or, to use his official title, “exalted cyclops”) of the Eugene cell (“klavern”) of the Ku Klux Klan. Being a leader of a secret terrorist organization was an obvious deal-killer when it came to having a building named after you, especially a dormitory in which African American students are regularly billeted.
Deady Hall was a tougher sell. To date, it has not been stripped of its name. Judge Matthew Deady, the first president of the university's board of regents, was, it is true, an open and enthusiastic advocate of slavery; but that was at a time when slavery was legal, and university leaders were reluctant to penalize Deady’s legacy for his failure to see the moral bankruptcy of something that was, in his day, common.
(Editor's Note: The University of Oregon decided, in mid-2020, to strip Deady's name from the hall. University President Michael Schill said of the decision that the university belongs to all Oregonians, Black and otherwise, and that it is of paramount importance that all Oregonians feel equally respected there.)
Deady was, however, rather an ironic Founding Father for the university to claim. He, more than anyone else, was responsible for it having been founded in the 1870s rather than the 1850s. (Eugene, Lane County; 1876) (For text and pictures, see http://offbeatoregon.com/1805d.matthew-deady-opposed-university.html)