Liet Kynes is the son of Pardot Kynes (Umma). His mother is Fremen, and he has been brought up as a Fremen. He is known to the Fremen as Liet, and to others as Doctor Kynes. His father has applied for him to take over as Imperial planetologist on his death - it is unlikely that this application will be refused. Liet Kynes has been taught by his father, so that he can continue his father's work to transform Arrakis into a green planet.
He is married to Faroula, a noted fremen herbalist originally from Red Wall Sietch, and they have a nine-week old daughter, Chani. They currently call Sietch Tabr home, but Liet spends much of his time in other sietches or in the city.