Kay de Stranges, Kay the Stranger, Kay l’Estrange
A Knight of the Round Table.
Malory mentions him appearing at the tournament of Leverzep (where he was jousted down by Palomides), as being among the would-be healers of Sir Urre, and as being among those killed during Lancelot’s rescue of Guenevere from the stake.
He may be the same character as Kay of Estral, Malory having misread ‘Kay D’Estral’ as ‘Kay l’Estrange’. He should not be confused with Arthur’s foster-brother Kay.
Source
Le Morte Darthur | Sir Thomas Malory, 1469-1470