Farran the Poisoner is a supporting villain in the Redwall book Salamandastron. He is an anthropomorphic fox with coal black fur, and was a master of all kinds of poisons, which he carried in a belt made of snakeskin. He was hired by Ferahgo the Assassin to poison Salamandastron's water and food supply. He succeeded, causing the deaths of two hares. However, he did not count on the poison working so quickly and was caught and killed by Urthstripe, who force-fed him his own poisons.
His success in poisoning the water later inadvertantly caused the death of Ferahgo's son Klitch.