H'ohk was a male Klingon professor in the 24th century. He spent some time as a guest professor in the Starfleet Academy, teaching Klingon Physiology. Kathryn Janeway attended his course and, would remember him to have been very harsh with the cadets. This helped Janeway to remember the course-content even decades later. (VOY: "Darkling") This character was only mentioned in dialogue.