If you mean Bella's daughter her name is Renesme. (sorry if I spelled that wrong) It's a mixture of Bella and Edward's mother's names: Rene and Esme.
Renesmee Carlie Cullen
In part 1 of Breaking Dawn, Edward and Bella get married. They go off to their honeymoon on Isle Esme where they conceive a baby. The end of part 1 leaves off when Bella discovers she is pregnant and calls Rosalie to get help.
Ashley Greeene
yes there will be a breaking dawn part one and part two coming out. part two is the last off all the movies. breaking dawn book was too big to put in one 2 hour movie without cutting a lot of things out
i think where after Bella beats Emmett at armwrestling and he stomped off
It is Called a thousand years
they are getting someone off exploretalent.com
they didnt know they could have one so it wasnt planned and Bella found that she wanted one once she was pregnant. Edward hated the baby for killing Bella but once renesmee was born edward was 'wrapped around her little finger'
In the beginning
Edward and Bella dont have a son they have a girl named Renesmee. Esme is the one who had a son but died. That's how Carlisle found Esme because after her son died she jumped off a cliff
In breaking dawn, Alice and Jasper run off without telling the other Cullens to find another baby similar to Renesmee. When she has found another halfvampire, she will present it to the volturi to show them that Renesmee is not dangerous and they should not kill her.
It depends which ad you are talking about, but it is probably A Thousand Years by Christina Perri.