Arasuil (T.A. 2691 - T.A. 2722) was a noble ranger of the north who was the first son of Arassuil, making him the elder brother of Arathorn I. He was married to Eldarian, the father of a son, and ancestor of Elgarain. While been sent away to Rivendell, Arasuil learned the ways of becoming a Ranger of the North and would one day become the next Chieftain of the Dúnedain. Years later, he and his wife were assigned to lead a small company of rangers in search for Arathorn, who went missing. During the search, he and his company were suddenly ambushed and killed by Orcs.
- Arasuil was an early manuscript that was changed to Arassuil.
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Peoples of Middle-earth, "The Heirs of Elendil", Commentaries, p. 211
- Characters in The Peoples of Middle-earth