Joseph was "The Mariner".
1717 Joseph Dennis, perhaps this one, and others, signed a letter to the King of England complaining about the appointment of governor Hunter of New Jersey. [1]
[1] William A. Whitehead, Documents relating to the Colonial History of the State of New Jersey. Archives Vol. 4. (Administration 1709-1720) (1882), 306, of 306-10, [HathiTrust], [GoogleBooks], [InternetArchive].