What alias did Frodo use in “The Lord of the Rings”?

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In "The Lord of the Rings," Gandalf's master plan for hiding Frodo from Sauron is... having him change his last name. Sure, it's an underwhelming idea from one of Middle-earth's most powerful beings, but hey, if it works, it works. So what alias did Gandalf pick for this questionable attempt at going incognito?



