A titular duke of Katelangen who gave up his fief in order to enter into spiritual service. He was the brother of Tampenteire and Manpfilyot, the husband of Schoysiane, the father of Sigune, and the paternal uncle of Percevalís wife Condwiramurs (Kondviramur).

When Condwiramursí country was invaded, Kyot and his brother Manpfilyot assisted her as well as possible, but they needed Perceval to save the duchy. When Perceval was anointed as Grail King, Duke Kyot escorted Percevalís wife and sons to the Grail Castle to join Perceval.