It is implied that Renesmee's growth will slow down until it ceases at the age of seven, by which she will have the appearance of a young woman. She may be able to live for centuries minimum, if not more.
Renesmee is special, because she is not an Immortal Child, or a child that was bitten by a vampire. Instead, Renesmee is born biologically.
However, as a half immortal, she will continue to grow until her full maturity at the age of about seven, at which point she will appear to be about seventeen (like her father Edward) and will cease to age (as shown by Nahuel in Breaking Dawn).
Renesmee will eventually reach an age of maturity and stop growing, just like Nahuel, but she does have some time of growing left. Vampires are not used to growing, but Renesmee's aging process is much faster than a human's.
Renesmee got married to Jacob and made Lucina her maid of honor. In Have A Purpose, Renesmee reveals that she is pregnant. She gives birth to Evan and Sarah and appointed Lucina as the godmother to her kids.
Members of the Quileute wolf-pack do age if they do not phase for a long time; Jacob's body has physically grown to the equivalent of a 25-year-old in Breaking Dawn but stops aging after that. Jacob is the largest and strongest of the pack.
Fans know, in the end, Jacob and Renesmee do live happily ever after together, along with Edward and Bella. Shoutout to Alice's future-telling skills! She gave viewers a glimpse of the future at the end of Breaking Dawn: Part 2.
The Cullens are safe again, and Renesmee is able to stay with her family. Nahuel states that Renesmee will probably reach complete physical maturity around seven years after her birth, at which point she will stop aging and live to an unknown extent of years.
Here's a little… memory… that I wish I could forget. What IS THAT?! Actress Mackenzie Foy takes on the role of a slightly older Renesmee Cullen, the child of Bella Swan and Edward Cullen .
While she prefers human blood, like all vampires, Renesmee can subsist on a "vegetarian" diet.
Renesmee Cullen: a vampire hybrid. A human-vampire hybrid, also known as half-vampire, vampire hybrid, half-human and half-vampire, and half-immortal, is the offspring of a female human and a male vampire.
While some fans believe that Leah fell in love with or imprinted on Jacob during Breaking Dawn, Stephenie Meyer has stated this isn't true. This would simply have made their interactions too complicated, since she started out disliking Jacob, then they gain a "friendly" understanding.
Renée becomes a grandmother during Bella and Edward's honeymoon, but she does not learn of the existence of her granddaughter, Renesmee, nor does she know that Bella has become a vampire afterward due to their worries about her being unable to handle the changes.
“Immortal Children” (a.k.a. Baby Vampires)
These are small children who have been turned into full vampires, meaning they will stay 5 years old (or 4 or 8, you pick) for the rest of their lives.
Renesmee got married to Jacob and made Lucina her maid of honor. In Have A Purpose, Renesmee reveals that she is pregnant. She gives birth to Evan and Sarah and appointed Lucina as the godmother to her kids.
At the end of Eclipse, she becomes engaged to Edward Cullen, and they marry in Breaking Dawn, one month prior to her 19th birthday. On their honeymoon, she becomes pregnant, and, due to the peculiar nature of her baby, Bella nearly dies giving birth to their daughter, Renesmee.
Taha Aki, the first shape-shifter in the Quileute tribe.
The Romanian coven is one of the oldest vampire covens in existence. This coven is located somewhere in Romania, known as Dacia at the time of its founding. It was the original ruling coven before the Volturi overthrew them with their supernaturally talented guards, in a war between 400 and 500 AD.
Stephenie Meyer, creator of the novel series which the popular films are based on, has hinted that she is writing a new Twilight spin-off series that will focus on Jacob Black (Taylor Lautner) and his relationship with Renesmee (Mackenzie Foy), the daughter of Bella Swan (Kristen Stewart) and Edward Cullen (Robert ...
Remember Nahuel that Alice/Jasper brought to the clearing? He was around 150y. From the official guide that SM wrote & released: "once a werewolf transforms, his aging speeds up until he reaches the age of maturity, roughly twenty-five. At this point, as long as he continues to phase, he remains at that age.
While Jacob insists his feelings for Renesmee (Mackenzie Foy) will remain completely platonic until later in her life (as does Twilight author Stephenie Meyer), Bella (and most of the fandom) find their relationship to be unsettling at best.
Near the end of Breaking Dawn - Part 2, Alice has a vision of the confrontation turning violent, and Jacob takes Renesmee away at Bella's request, and manage to escape despite the approach of Santiago, a Volturi guard. However, the fight is prevented in the end, and Jacob and Renesmee stay with their families.
By imprinting on Renesmee, Jacob has imbued her with protection from other werewolves in his tribe. Prior to taking her on as a romantic partner, Jacob would first act as an older brother to Renesmee until she grew up – which won't take long given her hybrid nature, which makes her age more quickly.
Jacob will live as long as he keeps phasing and he won't stop as long as Ren is alive. So technically he CAN live forever but he could also be killed by a vampire, another wolf-shifter or Ren could die by one of those and Jacob would stop phasing and die of old age.