What is "arwen"

Arwen Undómiel is a fictional character in J. R. R. Tolkien's legendarium. She appears in his novel, The Lord of the Rings, usually published in three volumes. Arwen is one of the half-elven who lived during the Third Age.

Arwen can refer to:

• Arwen, a character from The Lord of the Rings, also known as "Arwen Undómiel" or "Arwen Evenstar"
• ARWEN 37 and ARWEN ACE, two varieties of riot control gun