The gravestone of J.R.R. Tolkien and his wife Edith, in Wolvercote Cemetery, Oxford, UK. The names engraved under their own were chosen by John based on characters from his Middle-earth legendarium. Luthien was the most beautiful of the children of Iluvatar and forsook her immortality for her love of the mortal warrior Beren. John and Edith Tolkien were married for over 50 years. She was the Luthien to his Beren :)