Question: Luthien, who appears in Tolkien's companion to The Lord of the Rings, "The Silmarillion", has her story told to Frodo by the heir of Isildur, who was first introduced by what name?
Sentence (from "Aragorn"): He was eventually discovered to be the heir of Isildur and rightful claimant to the thrones of Arnor and Gondor.
Relevant evidence: No