Two entries with the name Argons.
Argons
Grandfather of Sir Guiron the Courteous.
He was the son of Febus and Florine and the father of Fragus. His brothers were Siraouc, Niatar, Altan, and Lannor.
Source
Palamedes | c. 1240
Argons
Argus, Arguys
A Cornish knight related to King Mark.
He led a company of soldiers against a group of Saxon invaders under Sir Elyas.
Source
Prose Tristan | 1230-1240
Le Morte Darthur | Sir Thomas Malory, 1469-1470