[Gil-Galad]

i think i got it

Boy- a male hobbit ("They would be small, only children to your eyes" Aragorn speaking of hobbits)

in agony abducted- it could be Frodos parents, since they died in a boating accident, well they drowned so they were kind of missing

hero's father- Drago is Frodos father, and we all know that Frodo is a hero

so my guess would be Drago