In God of War Ragnarök, Freyr's magical sword is named Ingrid.
Ingrid is a legendary weapon associated with the Vanir god Freyr. During Ragnarök, Freyr gives the sword to Atreus, who carries it during parts of the journey. The weapon is unusual because it can move and fight independently, acting almost like a living companion in battle.
The game's version draws on Norse myth, where Freyr is associated with prosperity, fertility, kingship and a famous self-fighting sword. Ragnarök adapts that tradition into a character-focused story involving Freyr's resistance movement in Vanaheim and his relationship with the other heroes.
Ingrid is easy to confuse with other named weapons in the series. Gram is connected with Norse heroic legend, Hofund is Heimdall's sword, and Dáinsleif is a mythological sword referenced elsewhere in the game's wider weapon lore. None of those is Freyr's sword in Ragnarök.