Bilbo Baggins: A hobbit of the Shire, he was the son of Bungo Baggins and Belladonna Took. Born on September 22nd, 2890 of the Third Age, he lived in Bag End, under Hobbiton Hill.
In 2941, Bilbo was lured away by the wizard Gandalf and thirteen Dwarves on the quest of Thorin Oakenshield and company to claim the Kingdom under the Mountain. Bilbo was taken along as their burglar. On the quest he met the trolls Tom, Bert and Bill Huggins; orcs and goblins, wargs, eagles, Beorn and the elves of Mirkwood. The Quest eventually led to the slaying of Smaug the Dragon and the re-establishment of the Kingdom under the Mountain at Erebor.
With a modest portion of the Dragon treasure he won on his adventure, Bilbo returned to the Shire and was a peaceful hobbit for sixty years.
On the Quest, Bilbo had acquired a magic ring which had the power to make its bearer invisible. It was later identified as the One Ring that belonged to Sauron, the Dark Lord.
In 3001 of the Third Age, Bilbo held a huge birthday party, and vanished before the eyes of his family and friends, leaving wealth, home and the One Ring to his cousin Frodo. He had adopted Frodo as his heir in the year 2989 of the Third Age.
Bilbo then went on to live in Rivendell and for twenty years wrote poems, stories of Elf-lore, as well as his memoirs, entitled "There and Back Again" and his three-volume scholarly work, "Translations from the Elvish".
After the War of the Ring, at the age of 131 years, Bilbo sailed with Frodo
to the Undying Lands.