Mogthrasir

In Norse mythology, Mǫgþrasir (Old Norse: [ˈmɔɣˌθrɑsez̠], possibly meaning "the one who is striving for sons" ) is a jǫtunn who is solely attested in stanza 49 of the poem Vafþrúðnismál from the Poetic Edda.

Vafþrúðnismál
Mǫgþrasir is mentioned during the contest of wisdom between Óðinn and the giant Vafþrúðnir:

Theories
According to Carolyne Larrington, the identities of these maidens are uncertain but they are probably the Norns. If this is the case, then Mǫgþrasir is either their father or is being used as a kenning to indicate the Norns' kinship with the jötnar.