If I need a new ship category to be added to any of my profiles, I tend to send a PM to Graeme with voyage details, including a link to a passenger list if there is one, and the relevant profiles.
I just did that yesterday and he was kind enough to do this for a new family of 10 I recently discovered. This family had 3 generations - 2 grandparents, 5 children, 1 daughter in law and 2 grandchildren.