ok why are jasper and rosalies last name hale when every bodys last name is cullen? are they rtelated au something?

Well,they're not biologically related, but Rosalie's last name is Hale and she wanted to keep part of her human life with her. Then Jasper came with Alice and because Rosalie and Jasper looked alike, Jasper took Rosalie's last name, Hale. Now they pretend they are twins. Also, it meant that Jasper and Alice and Emmett and Rosalie could go out together without it seeming weird that they have the same last names.

Hope that helps. :D

becase they look alike the cullens say that jasper and rosilie are twins and that they are esmes neace and nefew.Hale is rosilie's last name and Jasper used it to support that they are twins. the rest use cullen becase they all say the wer adoped kwa carlise and esme. hope this helps