his name is ephraim black
Quillete Tribe
Jacob's great grandfathers name is Ephraim Black, was the last Quileute chief and was in the "last" wolf pack.
Rachel and in case you were wondering, Paul imprints her.
Well Jacobs grandfathers tribe was descended from wolves which i guess is why ,his great grandfather was a wolf but the gene was passed down to Jacob himself ,and the rest of the wolves great grandfather must have been in Jacobs great grandfathers tribe which is why they are also were wolves .
Jacobs tribe is called the Quileuet tribe which is made from 4 families;AtearaBlackClearwaterand Uley.
Because he was in an accident.
I'm pretty sure that it never says, but you find out in Breaking Dawn, the only time that she's mentioned, that she died in a car crash.
I think it is Jacobs sister Rachel.
Billy Jacobs's birth name is Paul Jacobs.
Jaye Jacobs's birth name is Emma Jacobs.
Jacobs dad
Al Jacobs's birth name is Albert T. Jacobs.