Hi John. Sorry but we need more information from you here. The two bullet points in your question, about what you can add and your sources, are blank.
You can edit your question. Return to it on its G2G web page, and click the small link edit just under the original question. Insert more details of what you want to add (a relative? a date?), and describe the sources which support this. The kinds of sources required for pre-1700 profiles are described at this link.