Rings of Power has introduced Narsil, the sword famously broken when Elendil fought Sauron (& which Isildur claimed) but ...
SEE ALSO: Did you catch this hint at the Stranger's real name in 'The Lord of the Rings: The Rings of Power' Season 2? As Elendil hands in his sword, his former sailors salute him in an "O Captain!
Arwen's Elven sword, Hadhafang, had a long history prior to the events of Peter Jackson's The Lord of the Rings: The Fellowship of the Ring.