Gildor Inglorion is a fictional character from J. R. R. Tolkien's Middle-earth legendarium, appearing in The Fellowship of the Ring. He was a Noldorin Elf of the House of Finrod. In The Lord of the Rings he met Frodo Baggins and his friends in the Shire. The appearance of his band (along with the chants to Elbereth) warded off the Black Rider searching for the Hobbits.

Source: http://en.wikipedia.org/wiki/Gildor_Inglorion