The name of the caretaker in the Harry Potter series, Argus Filch, referring to the many-eyed watchman of Greek mythology. Argus Filch is always on the lookout for misbahaving students.
Another HP-related Argus: Argus Pyrites, who was edited out of the final books. He was originally the person who told Voldemort where the Potters were hiding, and he is the author of Alchemy, Ancient Art and Science.
This is also a type of lizard. The Argus Monitor from Australia is one of the largest domesticated lizards in the world and can be owned right here in the U.S. Although it is not quite as popular as Savannah monitors, it is quite known.