Rascal
Middle English (in the senses ‘a mob’ and ‘member of the rabble’): from Old French rascaille ‘rabble’, of uncertain origin.
wiktionary
Recorded since c.1330, as Middle English rascaile(“people of the lowest class, rabble of an army”), derived from 12th century Old French rascaille(“outcast, rabble”) (modern French racaille), perhaps from rasque(“mud, filth, scab, dregs”), from Vulgar Latin *rasicō(“to scrape”). The singular form is first attested in 1461; the present extended sense of "low, dishonest person" is from early 1586.
etymonline
rascal (n.)
mid-14c., rascaile "people of the lowest class, the general mass; rabble or foot-soldiers of an army" (senses now obsolete), also singular, "low, tricky, dishonest person," from Old French rascaille "rabble, mob" (12c., Modern French racaille), as Cotgrave's French-English Dictionary (1611) defines it: "the rascality or base and rascall sort, the scumme, dregs, offals, outcasts, of any company."
This is of uncertain origin, perhaps a diminutive from Old French rascler, from Vulgar Latin *rasicare "to scrape" (see rash (n.)) on the notion of "the scrapings." "[U]sed in objurgation with much latitude, and often, like rogue, with slight meaning" [Century Dictionary]. Used also in Middle English of animals unfit to chase as game on account of some quality, especially a lean deer. Also formerly an adjective.
