Vanaheimr

In addition, Vafþrúðnir comments that, when the world ends (Ragnarök), Njörðr will return to the "wise Vanir" (Bellows here anglicizes Vanir to Wanes): In chapter 23 of the Prose Edda book Gylfaginning, the enthroned figure of High says that Njörðr was raised in Vanaheimr, but was later sent as a hostage to the Æsir.

[5] Chapter 4 describes the Æsir-Vanir War, noting that during a hostage exchange, the Æsir sent the god Hœnir to Vanaheim and there he was immediately made chieftain.

Henry Adams Bellows considers the other eight to be Asgard, Álfheimr, Midgard, Jötunheimr, Svartálfaheimr, Niflheim, Múspellsheimr and Helheim.

Hilda Ellis Davidson comments that exactly where Vanaheimr fall among the Nine Worlds isn't clear, since "the chief gods Freyr and Njord with a number of others, are represented along with the Æsir in Asgard, but it seems probable that it was in the underworld."

[9] Rudolf Simek claims that Snorri "unquestionably" invented the name Vanaheimr as a Vanir counterpart to Asgard, but does not mention the Vafþrúðnismál reference.