The subject of this article originates from non-canonical sources. To find out about what is considered "canon" see LOTR:Canon.
Portrayal in adaptationsEdit
Peter Jackson's The Fellowship of the RingEdit
In Peter Jackson's film adaption of The Fellowship of the Ring, Aragorn is given a long, Elven dagger by Lord Celeborn in Lothlórien although in the deleted scene it is shown that he does not receive anything (this is because the Lady Galadriel sees the Evenstar on his neck and proclaims that she has "nothing greater to give but the gift you already bear"). He uses it at the Skirmish at Amon Hen and in all the battles proceeding this.
Peter Jackson's The Two TowersEdit
In The Lord of the Rings: The Two Towers, it is seen when Éowyn is training with a Rohirrim sword; Aragorn parrys the blade with his knife. It is later seen in the Battle of Helm's Deep, also used by Aragorn.
It is last seen when Aragorn is fighting an armoured Troll at the Battle of the Black Gate, he stabs the Troll in the foot with the dagger when the creature has knocked him down and is stepping on him.