Einherjarium may refer to:
- The loot from Final Fantasy XII.
- The loot from Final Fantasy Tactics A2: Grimoire of the Rift.
- The item from Final Fantasy Tactics S.
Einherjar or einherjarium are those that have died in battle and are brought to Valhalla by valkyries. The einherjar prepare daily for the events of Ragnarök, when they will advance for an immense battle at the field of Vígríðr; the battle which the "ein" (here meaning single-time) refers to.