18Bella Is Descended From Vampires
Another explanation for Bella’s power as a vampire is that she’s descended from vampires herself. Bella’s mother is Renee, and her name comes from “Renatus.” The feminine form of Renatus is Renata, which is the name of a vampire guard whose special ability is to deflect
physical attacks. Renata is from Malta, and there’s another vampire from Malta—Makenna. Malta is close to Italy, and there are multiple references to the peninsula in the Twilight series, including Bella’s full name, “Isabella”.
We know that half-vampires grow at a much quicker pace than normal humans, so since Bella seems to have developed like the average human, she’d have to be several generations removed from her vampiric ancestor.