Bilbo is from the Shire
"in a hole in the ground" (1).
"Never had any adventures at all" (1).
he took things slow, never in a hurry

Bilbo is from his new found anquantances
12 strange dwarves who are named in pairs
giving him encouragement and pushing him
sending him on a wonderous journey

Bilbo is from his secret longing for adventure
his baggins need for excitement
unrealized until his travels 

Bilbo is from his finding of the ring
a "very beatiful thing"
found in Gollum's cave

Image via Wikipedia