This option is made possible by the Norwegian Air name change policy to make it easier for guests to fly. This straightforward policy outlines all the rules that are relevant to name changes. While some passengers may wish to change their names on their tickets, others may only want to fix any mistakes they made when making their reservations. Passengers who purchased their tickets directly or indirectly from the official sources of the airline are eligible for name changes.
https://www.travomonk.com/name-change/norwegian-air-name-change-policy/