The name of Sean Connery’s bikini-and bandoleer cladc haracter in the movie Zardoz. Zed plays a role in the film somewhat similar to that of Case in the novel Neuromancer — he is used as a tool in a byzantine suicide by some form of technologically enhanced Higher Being.
Also: The owner of the motorcycle in Pulp Fiction who rapes Marsellus Wallace. Zed ends up with a medieval fate, and his motorcycle becomes a tool of escape from Los Angeles.
Also: the last letter of the alphabet (British usage). In the film A Zed and Two Naughts the twin main characters commit suicide and film their own decomposition.