I also am trying to find information on John Hunter in order to learn more about his parents. The information I have is Senator John Hunter had the following siblings: Agnes, Henry, Elizabeth, Jane (Jeane)-my ancestor, and Mathew. I have one unconfirmed source that says that Senator John Hunter's father was named John as well and that he had the above children from wife (name unknown) number one. He subsequently married again.
Have you learned any more information since your posting in 2002?