A knight who was the brother of Sir Brian of the Isles and the cousin of Nimue in Malory’s Le Morte Darthur.
Mellot and Brian tried to free Nimue when she was abducted by Hontzlake of Wendland, but they could not defeat him. Their battle, however, delayed Hontzlake long enough to allow Pellinore to catch up to him and slay the abductor.
He may be identical to Meliot of Logres.
Source
Le Morte Darthur | Sir Thomas Malory, 1469-1470