The European Nomads
Alistair is one of Carlisle's distant friends, called to witness Renesmee's true nature. He accuses Carlisle of putting him in danger of getting killed by the Cullens and leaves shortly after.
Charles & Makenna
Charles and Makenna form part of the group of Cullen witnesses. They tell Aro that they've come to witness, not to fight, and that the Volturi's attack on the Cullens would expose their true intentions to destroy the other family, not to do justice.