Two entries with the name Blancheland.
Blancheland
The Middle English Sir Gawain and the Carl of Carlisle names the Lady of Blancheland, a fairy, as the mother of ‘The Knyght of Armus Grene’ by Sir Ironside.
See also
Green Knight | The Legend of King Arthur
Fairies | Myths and Legends
Source
Syre Gawene and the Carle of Carlyle | c. 1400
Blancheland
Latin: Alba Landa
Cornish: Chyrgwyn
In Cornwall there is a meadow which is called Blancheland.
See also
Mark’s Hunting Lodge | The Legend of King Arthur