In Norse mythology, there are two tribes of gods: the Vanir and the Aesir. The Vanir tribe are fertility gods, while the Aesir are warrior gods. During the Viking Age, the people of Scandinavia relied heavily on farming for their survival, so the Vanir gods played a crucial role in their worship. As the son of Skadi, a frost giantess, and Njord, the god of the sea, Freyr is a sun god who is a member of the Vanir, associated with fertility and peace. His twin sister, Frejya, is also well known for her cunning and beauty throughout Norse mythology.