Carlisle Cullen is the oldest Cullen vampire and founder of the Olympic Coven. He is married to Esme Platt Evenson, who goes by the name Mrs. Cullen and is a Cullen vampire. Edward Masen, Mary Alice Brandon, and Emmett McCarty go by the names Edward, Alice, and Emmett Cullen. Edward married Bella Swan at the beginning of Breaking Dawn and she became Bella Cullen. Edward and Bella have one daughter, Renesmee Carlie, who's surname is Cullen. So together, there are seven vampires in Twilight with the surname Cullen.