What is the significance of Jack wanting to be called by his last name in Lord of the Flies?

Jack wanting to be called by his last name in "Lord of the Flies" signifies his desire to assert power and dominance over the other boys on the island. By using his last name, Jack separates himself from the group and signifies his authority. It also highlights his desire to distance himself from the constrictions of civilization and embrace a more primitive and savage persona.