He is a principal protagonist of Tolkien’s The Lord of the Rings. He is also mentioned in The Silmarillion. He was a hobbit of the Shire who inherited Sauron’s Ring from Bilbo Baggins and undertook the quest to destroy it in the fires of Mount Doom.
Frodo is introduced in The Fellowship of the Ring as the adoptive heir of Bilbo Baggins. In “A Long Expected Party” it is revealed that Frodo’s parents Drogo Baggins and Primula Brandybuck had been killed in a boating accident when Frodo was 12; he subsequently spent the next 9 years living with his maternal family, the Brandybucks in Brandywine Hall. At the age of 21 he was adopted by his cousin, Bilbo, who brought him to live at Bag End. By coincidence he and Bilbo shared the same birthday, 22nd September. It was Bilbo who introduced the Elvish languages (Middle-earth) to Frodo, and they often shared long walking trips together.
Gandalf described Frodo as “taller than some and fairer than most, [with] a cleft in his chin: perky chap with a bright eye.” He had thick, curly brown hair like most other hobbits, and had fair skin due to his Fallohide ancestry.
Bilbo and Frodo shared a common birthday on 22 September, but Bilbo was 78 years Frodo’s senior. At the opening of The Fellowship of the Ring, Frodo and Bilbo were celebrating their thirty-third and one hundred and eleventh birthdays, respectively. Frodo inherited the Ring at this point, and due to its influence he still appeared about 33 during the War of the Ring, though his age was closer to 50.
Frodo, like Bilbo and his Took ancestors, was considered by many others in Hobbiton to be a little odd. His interest in the outside world and fascination with Elves and faraway places (like those to which Bilbo travelled in The Hobbit) were uncommon among hobbits.
When he left the Shire, Frodo was dressed in typical hobbit-fashion: knee-breeches, shirt, waistcoat, jacket, cloak. He was unarmed, save for a pocket-knife.
When the hobbits were waylaid by the Barrow-wight, they found long daggers made by Dúnedain in the wight’s treasure. These served as short-swords for the hobbits, but Frodo’s was broken when he resisted the Witch-king at the Ford of Bruinen. Later, Bilbo gave Frodo Sting, a magic Elven dagger, and a coat of mithril chain mail. The mail saved his life on three occasions, deflecting a spear-point in the Mines of Moria, an Orc-arrow along the Anduin, and finally Saruman’s knife at Bag End. Frodo wounded the Barrow-wight and a cave troll, but never kills anyone.
Like other members of the Fellowship of the Ring, Frodo received in Lórien a special cloak from Galadriel, which allowed him to blend in with natural surroundings. Galadriel also gave him a vial that reflected the light of Eärendil, the Evenstar, (and, by extension, of the Two Trees of Valinor).