tapster

kapakoitsija, viinuri, baarimikko One whose business is to tap or draw ale or other liquor; barkeep
1478, (w), (w), Prologue, 240-42, https://en.wikisource.org/wiki/The_Canterbury_Tales/General_Prologue

He knew the tavernes wel in every toun / And everich hostiler and tappestere / Bet than a lazar or a beggestere;

(..) A tapster is a good trade: an old cloak makes a new jerkin; a withered serving-man a fresh tapster.

There is a Twin-brother to this False-galloper, and hee cheats Inne-keepers onely, or their Tapsters, by learning first what Country-men they are, and of what kindred: and then bringing counterfeit letters of commendations from such an Uncle, or such a Coozen (wherein is requested, that the Bearer thereof may bee used kindely) (..)

About the second watch a general complaint of drought was made, both by the prisoner and his keepers. Among whom it was at last agreed that the constable should remain on duty, and the young fellow call up the tapster; in which disposition the latter apprehended not the least danger, as the constable was well armed, and could besides easily summon him back to his assistance, if the prisoner made the least attempt to gain his liberty.

(..) in a twinkling the accomplished sharper changes the pitchers and pretending to examine the contents, asks the tapster what kind of wine he has given him (..)