Welsh chronicles mention two names of horses owned by King Arthur. They are in the Tale of Culhwch ac Olwen, which is one of the stories that make up the Mabinogion. They attribute to Arthur a mare called Llamrei (or Llamrai) and another horse called Hengroen.
Later French sources call his horse Passelande.
There are several stones throughout the isle of Britain that claim to bear the hoofprint of Arthur's horse. Though unlikely to be true, they do show the breadth of the Arthurian legends.
Most things Arthur owned seemed to have got a name. The lance was called Ron, his helmet was named Goosewhite and his shield was called Pridwen, which depicted the Virgin Mary.
Characters from King Arthur's legends