Ector /ˈɛktɔːr, -ər/ is the adoptive father of King Arthur in the Matter of Britain. His biological son is Kay.
Alternative variants of his name include Hector, Auctor, Antor (Antour), Ectorius. In the Welsh stories, the father of Kay (Cei) is named Cynyr (Kyner).
Ector appears in the works of Robert de Boron and the Lancelot-Grail, as well as later adaptations such as the Post-Vulgate Cycle and Thomas Malory's Le Morte d'Arthur. In these versions, Merlin takes the infant Arthur from his biological parents, High King Uther Pendragon and Igraine, and brings him to Ector's estate. Sometimes portrayed as a king instead of merely a lord, Ector has an estate in the country as well as properties in London. Merlin does not reveal the boy's true identity, and Ector takes him on and raises him with Kay as his own son. When Kay is old enough to be knighted, Ector's young ward serves as his squire.
In Malory's telling, Ector also appears in the concluding book to recite a threnody lamenting Sir Lancelot's eventual death. However, the sole surviving manuscript of Mallory's work is missing the pages that would include this material, and at least one scholar has suggested that the speech may have been an addition by the text's printer, William Caxton.