Ideally, people with this information would add it in a comment on the profile, which would be sent to the project covering that profile to act on. However, the process isn't ideal, as it involves human beings. Forex, too many comments on notable profiles, especially, are people declaring the subject their xxx-great-great-grandparent, so people don't always pay enough attention to the comments.
Also - such a process doesn't account for the need to add a new profile for a new person, when such a need arises.