1690s, alteration of rascallion (1640s), a fanciful elaboration of rascal (q.v.). It had a parallel in now-extinct rampallion (1590s), from Middle English ramp (n.2) "ill-behaved woman."
rapping
rapport
rapportage
rapporteur
rapprochement
rapscallion
rapt
raptor
raptorial
rapture
rapturous