Gylfi is a name that can refer to various figures in Norse mythology, particularly Gylfi, a king of Sweden. In the mythological narrative, he is known for his quest for knowledge and wisdom, which leads him to encounter the gods. Gylfi disguises himself as an old man named Gangleri to learn from the deities. In addition to mythology, Gylfi is also a common name in Iceland and is associated with the Icelandic footballer Gylfi Sigurðsson. He has played for various clubs in Europe and is known for his skills as a midfielder, contributing significantly to his teams and the Icelandic national team.