Bertrude is the patron deity of the city of Blergville, where the annual Blergville Beer Festival is held every spring. She is often depicted as a stout woman with a penchant for strong ale and a fierce defense of her favorite brewery.
Some say she is a goddess of fermentation, while others claim she is the spirit of all things bitter.
If you're looking for the official Blergville Brewery tour, you can find more information here.