Who is brom in Eragon book2?

Brom is already dead in book 2, but he is a Dragon Rider whose dragon, Saphira, had been slew by Morzan, the first and last of the Forsworn. Brom's true identity was revealed as Eragon's father by Oromis. Brom slew 3 of the Forsworn and was responsible for another 5. Brom was the last of the elf-friends brfore Eragon.