William hair, named after King William I, refers to a facial hairstyle consisting of a mustache that fully covers the upper lip but leaves the chin clean-shaven.
William hair became popular in the 19th century and experienced a resurgence in the 1950s. It is often associated with masculinity, sophistication, and authority, and has been sported by numerous celebrities, including Clark Gable and John Wayne. Its popularity continues today, offering a timeless and versatile look.