A knight in the service of Lucius the Roman in Malory. He was known as one of the strongest men in Pavia.
During the first battle of the Roman War, Callyburne slew many of Arthur’s men but was killed by Sir Bors.
In the Alliterative Morte Arthure, Malory’s source, Callyburne appears as an unnamed ‘paynim of Perse’.
Source
Le Morte Darthur | Sir Thomas Malory, 1469-1470