chief male servant of a household who supervises other employees, receives guests, directs the serving of meals, and performs various personal services. The title originally applied to the person who had charge of the wine cellar and dispensed liquors, the name being derived from Middle English boteler (and various other forms), from Old French bouteillier, bottle bearer. In the European Middle Ages it meant precisely this, but in time it came to mean an official of the crown, who nominally had charge of the wine but who in fact was a person of high rank, having different duties in different countries at different times.
BUTLER
Meaning of BUTLER in English
Britannica English vocabulary. Английский словарь Британика. 2012