I've been inputting cooperations and other relations (baptism records, archives etc) in my database. I have been looking for a good visualization tool for visualizing the relationships map but I can't find any.

I acknowledge that the closest relationships will probably have been verbal, but  want to get an idea about the persons that are crucial within a social network in the 16th century.

I know it is a probably not the best tool, but I believe it can be revealing based upon a six degrees of separation kind of way.