Galantine, Galantyne, Galuth
Gawaine’s sword, given to him by the Lady of the Lake. Malory calls it Galantyne and Gawaine used it in the Roman War.
It is described as a powerful and radiant sword, often depicted as having a blad as bright as the sun. Galatine is closely linked to Gawain’s character and his reputation as a noble and courageous knight.
The Alliterative Morte Arthure calls it Galuth.
See also
Excalibur | The Legend of King Arthur
Source
Le Morte Darthur | Sir Thomas Malory, 1469-1470
Alliterative Morte Arthure | c. 1400