Kinon
A city and castle built by Kay, which, according to Geoffrey of Monmouth, served as his final resting place after he was killed in the Roman war.
Layamon says that the name of the city was changed to Caen in honor of the warrior. Perlesvaus, in contrast to Geoffrey, tells us that Kay fled to the castle after he defected from Arthur’s court.
Sources
Historia Regum Britanniae | Geoffrey of Monmouth, c. 1138
Roman de Brut | Wace, c. 1155
Brut | Layamon, late 12th century to mid-13th century
Perlesvaus | Early 13th century