Jord

Jǫrð (Old Norse "earth") is the personification of the earth in Norse mythology. She is the mother of the thunder god Þórr, and the consort of Óðinn. Some scholars refer to Jörð as a goddess.

Her name appears both as a poetic term for the land and in the Þórr kenning "son of Jörð". Fjörgyn and Hlóðyn are considered to be other names for Jörð.

Etymology
Jörð is the common word for earth in Old Norse. It stems from Proto-Germanic *erþō ('earth, soil, land'), as evidenced by the Gothic airþa, Old English eorþ, Old Saxon ertha, Old High German erda, Faroese jørð. The Ancient Greek ἔρα ('earth') is possibly related.

Gylfaginning
In Gylfaginning, the first part of the Prose Edda, Jörð is described as a member of the ásynjur, one of Óðinn's sexual partners and the mother of Þórr. She is the daughter of Annarr ('Second') and Nótt ('Night').

According to scholar John Lindow, "Jörd must have been a giantess in the beginning. If so, Óðinn's marriage (or, more likely, sexual relationship outside marriage, perhaps not even a willing one on her part) to Jörd should be regarded as parallel to his other strategically minded relationships with giantesses."

Scholar Haukur Þorgeirsson points out that the four manuscripts of Gylfaginning vary in their descriptions of the family relations between Nótt, Jörð, Dagr, and Dellingr. In other words, depending on the manuscript, either Jörð or Nótt is the mother of Dagr and partner of Dellingr. Haukur details that "the oldest manuscript, U, offers a version where Jǫrð is the wife of Dellingr and the mother of Dagr while the other manuscripts, R, W and T, cast Nótt in the role of Dellingr's wife and Dagr's mother", and argues that "the version in U came about accidentally when the writer of U or its antecedent shortened a text similar to that in RWT. The results of this accident made their way into the Icelandic poetic tradition".

Skáldskaparmál
In Snorri Sturluson's Skáldskaparmál, Jörð (as the personified earth) is called "one who shares a man with Frigg", and Þórr "son of Jörð".

She is depicted as the rival of Óðinn's wife Frigg and his other giantess concubines, Rindr and Gunnlöd.

Poetic Edda
In Lokasenna, Þórr is called Jarðar burr ("son of Jörð").

In the same verse in Völuspá, he is referred to as mǫgr Hlóðyniar and Fjǫrgyniar burr (child of Hlóðyn, Fjörgyn's child). The etymologically unclear Hlóðyn must therefore have been another name of Jörð. She is usually thought to be identical with Hludana, to whom Roman votive tablets have been found on the Lower Rhine.