An eccentric hobbit who originally found the One Ring in Gollum's cave and brought it to the Shire. On his birthday, he reluctantly leaves the Ring for his nephew Frodo under Gandalf's guidance and departs for Rivendell.
Bilbo is Frodo's older relative and transfers responsibility for the Ring to him.
The plot identifies Frodo as Bilbo's nephew. Bilbo leaves the One Ring to Frodo during his birthday celebration.
Gandalf influences Bilbo's decision to surrender the Ring.
Gandalf advises Bilbo to leave the Ring for Frodo, and Bilbo follows his guidance before departing for Rivendell.
Their connection is formed through the Ring's transfer from Gollum to Bilbo.
Bilbo discovers the Ring in Gollum's cave and brings it back to the Shire after Gollum has possessed it for centuries.
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