What is gyllenhaal name origin?

The surname Gyllenhaal is of Swedish origin and is derived from the words "gyllen" meaning "golden" and "hals" meaning "neck". The name is known to have originated in the region of Österbotten (Ostrobothnia) in Finland, which was then under Swedish rule. One theory is that the name was given to someone who had a golden or yellow neck or collar, indicating a wealthy or prosperous person. The name gained prominence in modern times due to famous bearers such as actors Jake and Maggie Gyllenhaal.