Who is the bartender in leaky cauldron?

The bartender in the Leaky Cauldron is Tom, though he is often referred to simply as the barman.

He is a friendly and welcoming wizard who serves a wide range of drinks to patrons of the pub, including a particularly popular drink called "butterbeer." While he is not a major character in the Harry Potter series, he plays a significant role in establishing the Leaky Cauldron as a welcoming and comfortable space for wizards and witches.