Who Is Thor's Mother in God of War? Fjorgyn the Giantess

Thor's mother in God of War is Fjorgyn, a Jotunn giantess and goddess of the earth and trees who was one of Odin's wives. She never appears on screen. She's dead long before Kratos reaches the Norse realms, and the games only mention her. (God of War (2018); God of War Ragnarök)

Is Thor part giant?#

Yes. The wiki's Fjorgyn entry gives her species as Jotunn and her birthplace as Jotunheim, and its Thor entry calls him half giant and half god. Thor's own hatred of giants is the strange part. He takes pleasure in killing them even though his mother was one, and the wiki notes the oddity directly. (God of War Wiki, Thor)

Thor isn't the only one in the series with a giantess for a mother. The wiki's Thor trivia points out that Atreus is in the same position, since Faye was a Jotunn too. (God of War Wiki, Thor)

Where do the games mention her?#

The best-known line is Mimir's. He tells Atreus that Odin hates the Giants and they hate him back, but Thor's own mother was the Giantess Fjorgyn, one of Odin's great loves. In the wiki's account, Mimir says Odin was lonely for ages once she was gone. The wiki's infobox lists her as mentioned only in God of War (2018) and Ragnarök, and its body text places Mimir's lines in Ragnarök. (God of War Ragnarök; God of War Wiki, Fjörgyn)

The other source is a lore marker called the Rites of Fjorgyn, which records her funeral. It names her as a Jotnar goddess of earth and trees and sums up her fate in three lines: seduced for her beauty, betrayed for her love, and robbed of her life in return for her "gift of life". (God of War (2018), lore marker, as quoted by the God of War Wiki)

How did Thor's mother die?#

Nobody in the games says. Mimir calls the cause of death murky at best, and says he isn't sure he can blame Odin, because Odin was never the same afterwards. The Odin entry on the wiki puts it as Fjorgyn dying mysteriously some time after Thor's birth. (God of War Ragnarök; God of War Wiki, Odin)

The funeral marker is where the theories come from. Its line about a gift of life, plus the line saying her body will be carried to where the Thunder may never find her, led the wiki's editors to suggest she died giving birth to Thor. They also suggest this would explain why Odin treats Thor so cruelly. That's a fan reading and the wiki flags it as an implication. (God of War Wiki, Fjörgyn)

My read: I think the childbirth reading is the likeliest, because the marker's wording points that way and nothing in either game contradicts it. But "the likeliest guess" is as far as I'd go. The games leave the cause open, and Mimir's own hedge suggests that's deliberate.

Is Freya Thor's mother?#

No. Freya is the mother of Baldur, and the wiki lists her as Thor's stepmother. The order matters: Mimir came to believe Odin missed Fjorgyn and wanted someone to replace her, which helped push him toward marrying Freya to end the Aesir-Vanir War. Odin felt love again for a while, then lost it. (God of War (2018); God of War Wiki, Fjörgyn, Odin)

A short timeline#

1. Odin marries the giantess Fjorgyn, and they have Thor.
2. Fjorgyn dies, and the cause is never explained.
3. Odin grieves for ages, according to Mimir.
4. He marries Freya, partly to end the Aesir-Vanir War.

(God of War Wiki, Odin and Fjörgyn; God of War Ragnarök)

Canon Notes#

Where to go next#

For her whole story, including what Mimir believed about her death and Odin's second marriage, read Fjorgyn. For her son, see Thor.