I might've been right before, but I just got the answer the wrong way.
If I'm not right this time then I will be quite angry with you, SP.
Boy- a male hobbit ("They would be small, only children to your eyes" Aragorn speaking of hobbits)
in agony abducted- What can be found in "agony abducted"? Bag End!
And who could be found in Bag End? Bungo, Bilbo, Frodo, and Sam
So which one is it?
hero's father- Bilbo and Frodo were not fathers and I don't recall any tales of Sam's children doing heroic things, so it must be Bungo.