Passengers on the Hovding 1873 to NZ

Hi, I believe that my Great Great Grandparents were on this sailing to New Zealand. Their names were Anton and Helen Amundsen (nee Hansen). Also they had a baby girl on-board ship in the middle of the Atlantic ocean. They named her Emily Antonia Atlantica Amundsen. She was my Great Grandmother. Does anybody know anything more about them, please? I believe that they were both born in Christiania and that they may have been living in Naess, Kraagstad, just before they left for New Zealand on the Hovding in 1873. I would love to find out if there are any living relatives left in Norway. If anyone can please help, I would be so grateful.