Which of the following is a well-known Speyside brand?

Glenfiddich is indeed a well-known brand from the Speyside region of Scotland, which is famous for its production of single malt Scotch whisky. Speyside is home to a large number of distilleries, and Glenfiddich is one of the most iconic and best-selling single malt whiskies globally. The distillery's rich history, which dates back to 1887, and its consistent focus on quality and tradition have contributed to its recognition in the whisky community.

In addition to its branding, Glenfiddich is known for its distinctive flavors, which often include fruity and floral notes, a hallmark of many Speyside whiskies. The use of various cask types for aging, including American oak and European oak sherry casks, further enhances its diverse flavor profile, making it a favorite among whisky enthusiasts and newcomers alike.

In contrast, Laphroaig and Ardbeg are recognized for their peated whiskies sourced from Islay, known for robust, smoky flavors. Springbrook, while a valid name in whisky discussions, does not compete on the same level of recognition or heritage as Glenfiddich within the Speyside landscape.