Definition of "Louis"

"It is hardly a week since you called me your future husband, and treated me as such; now I am once more the tutor for you: I am addressed as Mr. Moore, and Sir; your lips have forgotten Louis." "No, Louis, no: it is an easy, liquid name, not soon forgotten."

1849, Currer Bell [pseudonym; Charlotte Brontë], chapter 36, in Shirley. A Tale. […], volumes (please specify |volume=I to III), London: Smith, Elder and Co., […]

It was a strange collection, like Billy Bones’s hoard for the diversity of coinage, but so much larger and so much more varied that I think I never had more pleasure than in sorting them. English, French, Spanish, Portuguese, Georges, and Louises, doubloons and double guineas and moidores and sequins, […]

1881–1882, Robert Louis Stevenson, Treasure Island, London, Paris: Cassell & Company, published 14 November 1883