1826, from Mex.Sp. peon "agricultural laborer" (esp. a debtor held in servitude by his creditor), from Sp., "day laborer," also "pedestrian," originally "foot soldier," from M.L. pedonem "foot soldier" (see pawn (2)). The word entered British Eng. earlier (1609) in the sense
"native constable, soldier, or messenger in India," via Port. peao "pedestrian, foot soldier, day laborer."
jargon A person with no special (root or wheel) privileges on a computer system. "I can't create an account on foovax for you; I'm only a peon there." [Jargon File] (2001-12-23)