Throughout Tolkien's works, characters adopt or are given different names as part of their stories. Aragorn is not only named Strider, but also Estel and Elessar and Thorongil. What importance does onomastics, the study of names, play in Tolkien's works? Why does he give characters multiple names? Is there a difference or not in the way names are used or change depending on race in Tolkien, i.e. Elves and Men? And what about Hobbits? Are names of Hobbits by nature different than those of other races?