Depending on the type of fare and the time of the trip, it is possible to change a passenger's name on a Carnival cruise. If at least one original guest is still listed on the reservation, name changes are typically permitted, per the Carnival Cruise Name Change Policy. Changes made well in advance of departure may be free for standard fares, but they are frequently not allowed for re... https://www.cruisesfares.com/blogs/carnival-cruise-name-change-policy