TinĂșviel is pronounced (tihn-OOH-vee-ehl). I think this is a very lovely name, especially if you know its background. The love between LĂșthien and Beren is simply beautiful.
The character of Luthien Tinuviel was based upon J.R.R. Tolkien's wife, Edith. The character of Beren was based on himself. The names "Luthien" and "Beren" are carved on their headstones as well.