You could begin by adding sources to the various profiles involved. You say you have the original documents,which is great, and gets you off to a good start. If you could make your own images of them, then they could be uploaded as sources, as long as they are non-copyright and importantly, do not refer to any living person, unless they have given their permission..
Otherwise, a transcription of the sources, stating where they came from, or where they could be found now, is better than nothing.