Éowyn

Éowyn was a member of the House of Eorl and the niece of King Théoden of Rohan. She was renowned for slaying the Witch-king of Angmar. She was the daughter of Théodwyn, Théoden's sister, and Éomund of Eastfold; her brother was Éomer. Following the end of the War of the Ring, she and Faramir were married, and she bore one son, Elboron.

She was also known as the Lady of Rohan, Lady of the Shield-arm, the White Lady of Rohan, and Lady of Ithilien.

(Source: Tolkien Gateway)