The article presents two likely and so far unknown compilers of the third edition of Koniáš’s Key from 1770. Their names have been revealed by a handwritten note in a copy that was originally a part of the library of the private collector Josef Bartsch (1731-1803). Concerning the first figure, the Jesuit Josef Kögler, the treatise describes his career in the Jesuit Order and the posts that he held. In the case of his co-worker Jan Kohout, the text outlines the possible connections that might help identify him precisely. and David Mach.