A lagniappe is "a small gift given to a customer by a merchant at the time of a purchase", or more broadly, "something given or obtained gratuitously or by way of good measure". It can be used more ge
"We picked up one excellent word – a word worth travelling to New Orleans to get; a nice limber, expressive, handy word – 'Lagniappe'. They pronounce it lanny-yap... When a child or a servant buys something in a shop – or even the mayor or governor, for aught I know – he finishes the operation by saying, – 'Give me something for lagniappe.' The shopman always responds; gives the child a bit of liquorice-root; (nb...)": Mark Twain, Life on the Mississippi (1883)
Casquette girls, or Filles du Roi were girls sent to New France as wives for colonists. In Louisiana, they became known as Pelican girls.