wallet (n.)

late 14c., "bag, knapsack," of uncertain origin, probably from an unrecorded Old North French *walet "roll, knapsack," or similar Germanic word in Anglo-French or Old French, from Proto-Germanic *wall- "roll," from PIE root *wel- (3) "to turn, revolve." Meaning "flat case for carrying paper money" is first recorded 1834, American English.