Jeff

Jeff is a character in Christopher Moore’s novel The Serpent of Venice.  Jeff is a small monkey and is owned by Pocket. Held captive in Genoan prison with Drool, but he is later rescued. There is a collar around his neck, and on its brass tag his name is written.

The rescue
Upon the attempt to assassinate Pocket, Drool and Jeff are held captive. Pocket is always keeping in mind his monkey, and he is doing all he can to find Drool and the monkey. They were held captive in a Genoan prison for ransom. The harbor at Genoa is the most fortified in the world. With the help of Jessica, Pocket seeks to trade him for four ducats, but learns that the monkey had been traded "for a jug from Giotto the wine seller on the piazza, a month ago." With ten ducats, which is Shylock's property, Jessica succeeds in buying the monkey back.

Impressions on the monkey by other characters
Antonio is fascinated with the monkey, but Iago and Brabantio don’t like this animal. However, even he considers Jeff to be frivolous in a business, and so he doesn’t keep him. Othello considers Jeff to be a horrible creature, but helps Pocket rescue him. Drool is extremely happy about the monkey's rescue.

Characters in the novel first assumed that Jeff or a mouse had killed Brabantio, but it is later revealed that Vivian, the water dragon, had killed him.

Personality
Jeff is very obedient towards his master, and he is very well trained and is dressed in motley (according to Antonio). For example, he brings wine to his master when he is depressed. He squats over the priest when ordered to do so. He delivers messages to characters following the orders of Pocket. For example, he delivers a letter to Shylock when he was in danger, which said "Don't be afraid. You are safe."

He has a weakness for hats, and he went a go at Pocket's hat.