If you only know the Lord of the Rings via the Peter Jackson films you will not know Tom Bombadil. A shame but an understandable one. He’s a weird character who doesn’t do a great deal to progress the story of the journey of the Ring from The Shire to Rivendell.
Tom is one of Tolkien’s earliest creations, named after one of the Tolkien children’s dolls and the subject of a 1934 poem. His cameo appearance in The Fellowship of the Ring is as a mysterious, somewhat ridiculous character, who aids Frodo and company in the Old Forest.