Arnold

1. Arnold
   

   A knight from Cornwall and brother of Sir Gautere.

   Arnold and Gautere fought against King Arthur in the tournament at the Castle Perilous.

   
   

2. Arnold
   

   Layamon names the Earl of Salisbury as Arnold.

   
   

3. Arnold Le Breuse
   

   He and his brother, Sir Gherard le Breuse (Gerard), were a murderous pair who "guarded" a passage of the water of Mortaise (Marcoisa) as an excuse to kill passing knights.

   Gareth slew them both on his way with Lynette to Castle Dangerous, to defeat the Red Knight of the Red Lands. This was Gareth's first conquest, not counting Sir Kay.