Sam Gamgee

Sam Gamgee was a Hobbit, and friend of Frodo.

Background
Sam and Frodo were at the tower of Cirith Ungol in Mordor. Guarded by the black Watchers, Sam and Frodo were able to pass when Sam held up the elven-glass of Galadriel to them. the glass counteracted the deadly force of the glittering eyes, and the great gate, and the Watchers, were destroyed.

Behind the scenes
Although Sam's last name is not given in the Companion, the identity of the character is obvious.

Hobbits or more specifically the book, 'The Hobbit' is mentioned in Hoyle I, by the character Cassie, in reply to King's Quest characters Graham and Rosella.