§ Elements in Quenya and Sindarin Names The Silmarillion

tin- 'sparkle' (Quenya tinta 'cause to sparkle', tinwe'spark') in Tintallë; also in tindómë 'starry twilight' (The Lord of the Rings Appendix D), whence tindómerel'daughter of the twilight', a poetic name for the nightingale (Sindarin Tinúviel). It appears also in Sindarin ithildin 'starmoon', the substance of which the devices on the West-gate of Moria were made.