In recent centuries in England a butler was head of the household staff but originally responsible for wine and beverages.

Tolkien’s Galion, butler to the Elvenking would have been no Jeeves. He was a butler on the early mediaeval model, responsible for ordering, receiving, laying down, decanting and possibly serving wine and other alcoholic drinks. In other words a “bottler” (Old French bouteillier).
Encyclopedia entry originally written by cirdaneth