The king of Alverne on the Green Island, whose land was routinely invaded by a terrible giant named Assiles.
Eventually, Assiles destroyed all of Flois’ land except for Effin castle. Flois sent his page Giwanet to Arthur’s court to ask for assistance. It arrived in the form of Gawaine, who slew the giant. In reward, Flois offered Gawaine his crown, but Gawaine refused and embarked for further adventures.
See also
Emenidis | The Legend of King Arthur
Source
Diu Crône | Heinrich von dem Türlin, c. 1230