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King Arthur's father is King Uther Pendragon.King Arthur's biological father was Uther Pendragon. His adoptive or foster father was Sir Ector.
In the legend of King Arthur, Sir Ector is the foster father of King Arthur. He raised Arthur as his own son and played a key role in Arthur's upbringing.
King Arthur loved his brother, sir Kay, his adopted father, Sir Ector, his country, and his wife, Guinevere.
Merlin was Arthur's tutor when he was a child in the care of Sir Ector. Merlin was the one who brought Arthur to Sir Ector from Arthur's mother Igraine. Merlin is responsible for educating Arthur to be the king he is supposed to be.
Arthur was raised by Sir Ector because Merlin was vanished.
Sir Ector
It is possible because, according to Legend, Merlin took Arthur from his biologicalparents Uther and Igraine- to be raised in Sir Ector's court. There is no mention of kidnapping or stealing Arthur away from his parent. And even of Arthur had been kidnapped, Sir Ector knew Uther, so why wouldn't he tell him that his son was at Ector's court while his parents thought of him as kidnapped?
Sir Ector and some think Merlin raised him. Merlin did not raise Arthur. Merlin helped Uther quench his lust for Igraine and therefore conceive Arthur but for a price. Merlin told Uther he would help if Uther consented to give up the child that would be conceived in that union. Uther of course said yes--never mind what Igraine, the mother might feel, but this was a different time from ours! Merlin knew the child--Arthur--was special and assured Uther that the babe would be raised by a man of honor--Ector.
Sir Ector was his foster father. No name given for his foster mother in traditional texts.
Young Arthur bursts into tears when Kay and Sir Ector humbly kneel before him because he is overwhelmed with emotion at the realization of his true identity as the rightful heir to the throne. This moment symbolizes the weight of responsibility and destiny that Arthur must now embrace as the future King of England.
In The Sword in the Stone, he lives in Sir Ector's Castle in the Forest Sauvage with Kay, Ector, and others. In the rest of the books, he lives with his wife Guenever, Sir Lancelot, the Orkneys, and the other Round Table members.
King Arthur is only called Wart in T H White's "Once and Future King" series, including "The Sword in the Stone" made into a Walt Disney film. That is as far as my research has got