Sting (Middle-earth)
Sting has the magical ability to detect orcs or goblins nearby, glowing blue in their presence, as it did when the Fellowship encountered orcs in the mines of Moria. Tolkien establishes this as a common property of First Age Elf blades, particularly those forged in Gondolin. Sting is also exceptionally sharp. Bilbo manages to thrust it without effort deep into a wooden beam at Rivendell. Frodo also wounds a troll in Moria, after Boromir notches his own sword with his attempt. Sam uses Sting to cut through the giant spider Shelob's strong webs with ease, and also wound the spider, driving it away from the paralyzed Frodo.
Frodo Baggins
Frodo did not appear until the third draft of "A Long-Expected Party" (the first chapter of "The Lord of the Rings"), when he was named Bingo (after a family of toy koala owned by Tolkien's children), son of Bilbo Baggins and Primula Brandybuck. In the fourth draft, he was renamed Bingo Bolger-Baggins, son of Rollo Bolger and Primula Brandybuck. Tolkien did not change the name to Frodo until the third phase of writing, when much of the narrative, as far as the hobbits' arrival in Rivendell, had already taken shape. Prior to this, the name "Frodo" had been used for the character who eventually became Peregrin Took.