Edoc`sil Ebrithil wrote:
*Gasp* Not know Brom? How could this be?.... What a tragedy!
Anyways...
(1) They may not know his realy name. What would he do with it anyways?
(2) Did they know who his father was? Maybe that was one of the things Brom told Saphira.
(3) I think he asked Arya but she didn't know what it was and had never heard of it. I could be worng though. I am wrong alot...

i was saying that brom is eragons father
also, here are the answers to your questions, 1. he has to open the rock of kuthian with it.
2. they probably do, since hes visited ellesmera
3. he did ask arya, but oromis would probably know