Basically a naming ceremony will include a welcome and introduction, readings, parents' promises or an affirmation of their love and care, the involvement of family and friends if you wish as godparents,carers, or mentors, the naming of the child, and closing words. You may also wish to include the reasons for choice of names or their meaning, parents vow to each other, acknowledgment of the role of grandparents, presentation of a gift for the child, inclusion of other siblings, mention of absent guests. There are lots of options to choose from to create a personal and meaningful ceremony.
Their are lots of beautiful readings, poetry, inspirational quotes, or wishes for the future that can be included as well. There are many styles of ceremony and lots of great ideas for naming ceremonies in my book Create An Inspiring Naming Ceremony.