Unfortunately, Stephenie Meyer doesn't say. She doesn't write much about Rachel and Rebecca, but based on the story, Jacob's birthday is some time in between October and January.
Rachel and Rebeccca are twins and a year older than Bella. Their last name is Black.
rachel and rebeeca
Rachel & Rebecca
Jacob's sisters are Rachel and Rebecca and they are twins, around 19 or 20
If the question is about the character Jacob from Twilight Saga then his sister's names are Rachel and Rebecca.
His birthday is the 14th January 1990
Rachel and Rebecca are Jacob's sisters and you find out about then in twilight the book but not in the movie
His birthday is the 14th January 1990
In the Twilight Saga: Offical Illustrated Guide His birthday is the 14th January 1990
In the Twilight Series, Jacob had no kids. If he did, the mother would probably be Renesmee, Edward and Bella's daughter.
They're twins.
Rachel but i don't know if they where twins though