In Norse mythology, according to the Gylfaginning, Annar (Old Norse Annarr 'second, another') is the father of Jörð (Mother Earth) by Nótt (the Night). The form Ónar (Old Norse Ónarr 'gaping') is found as a variant.
Annar/Ónar is also the name of a dwarf in the catalogue of dwarfs in the Völuspá that is repeated in the Gylfaginning.
In the pseudo-historical genealogy of Odin's ancestors in the introduction to Snorri Sturluson's Prose Edda, a certain Athra is said to be he "whom we call Annar". What this refers to is unknown. (See Sceafa for discussion of the section of this genealogy in which Annar appears.)
Snorri might have been using a source in which annar 'second, another' was intended to mean Odin, for he himself had just previously written of Odin: "The earth was his daughter and his wife...".
In council it was determined
That the King's friend, wise in counsel,
Should wed the Land, sole daughter
Of Ónar, greenly wooded.
His grandson is god Thor.
- Gylfaginning 10, 36.
- Lindow (2001:205).