Garjak was a male Ferengi, and the father of the famous DaiMon Greko. (ST - New Worlds, New Civilizations short story: "A Dry Day on Ferenginar") He had three other sons, named Mecko, Hecko, and Trop. (DS9 reference: Legends of the Ferengi) Garjak is named only in "A Dry Day on Ferenginar".