Arthad was an Adan of the First House, and one of the last twelve companions of Barahir in Dorthonion. The twelve outlaws were: Beren, Baragund, Belegund, Radhruin, Dairuin, Dagnir, Ragnor, Gildor, Gorlim, Arthad, Urthel, and Hathaldir.
Arthad was slain when Sauron's Orcs surprised the Men of Dorthonion in the early hours.
He is remembered in song.