Cercopithecus talapoin; Print; Guenon; The guenons are the genus Cercopithecus of Old World monkeys. Not all members of this genus have the word "guenon" in their common names; also; because of changes in scientific classification; some monkeys in other genera may have common names that include the word "guenon". Nonetheless; the use of the term guenon for monkeys of this genus is widely accepted.; 1700-1880