Welsh chronicles mention two names of horses owned by King Arthur. They are in the Tale of Culwich and Olwen. They attribute to Arthur a mare called Llamrei and another horse called Hengroen.
"And Kay, of North Britain, mounted Arthur's mare Llamrei, and was first in the attack. Then Kay, of North Britain, wielded a mighty axe, and absolutely daring he came valiantly up to the boar, and clave his head in twain. And Kay took away the tusk. Now the boar was not slain by the dogs that Yspaddaden had mentioned, but by Caval, Arthur's own dog."
Llamrei is also the name of one of the domains in Kingdoms of Camelot.