The Æsir (pronounced ['aiser] in Icelandic; singular Áss, feminine Ásynja, feminine plural Ásynjur) are the principal pantheon of deities in the Norse mythology. They include many of the major figures, such as Odin, Frigg, Thor, Baldr and Tyr. A second clan of gods, the Vanir, is also present in the Norse mythos. While the Æsir are connected with power and war, the Vanir are mainly involved with cultivation and fertility.