Jedda Adzhin-Dall was a Deltan quantum physicist who was assigned to Regula I, along with his mate, Zinaida Chitirih-Ra-Payjh, to work with Doctor Carol Marcus on Project Genesis. Jedda was killed by Captain Clark Terrell under the direction of Khan Noonien Singh in 2285, when Khan attacked the station to try and discover the secrets of the Genesis Device. (TOS movie, novelization & comic adaptation: Star Trek II: The Wrath of Khan)