Anxious Wizards

From The Templar Knight (Jan Guillou)

St Sebastian Martyr (Feastday 18th December)

How Sir Lancelot had do with the Fiend from... MARS!?

Sir Gareth on the quest for the Castle Dangerous

From Nemesis Games (James S. A. Corey)

N.B. a lost bear is being returned. This knight has not been quested to rob a child

(In the 1981 film Excalibur Sir Uryens knights Arthur after losing a duel to him. This doesn't happen in any Arthurian literature that I'm aware of, but I think the idea represents the spirit implicit in chivalrous romance remarkably well.)

Sir Pellinore paying worship to a damoiselle

Sir Fiore dei Liberi playing at arms with a Tartar horseman near Krakow

Sir Bedwyr (Bedivere) of the Perfect-Sinew

Sir Mordred

Sir Gareth of Orkney who is called Gaheris

How Sir Owain mab Urien instructed Peredur ap Efrawg in the knightly virtues

Sir Peredur being companionable with Sir Cei

From the Lyonesse trilogy (Jack Vance)

Sir Lancelot Du Lac consults his conscience

How Sir Tristan and Sir Palomedes were conciliated