Wikipedia as standard information field
It would be very useful (and easy to implement) to have a new information field where you can add a link to that person's wikipedia page. This could be used to then enhance the famous relatives feature, which currently lists very few people.
I think it would then be fantastic if the famous relatives feature returned everyone with a wikipedia page. This could be sorted by the strength of the relationship, which would be of interest to some people, or by the length of the wikipedia page, which would return people by how famous they were.