Have you looked at the families of Jonathan Caldwell FRIEND's children or brothers?
I have found many marriages between cousins.
I also descend from Silas and Margaret Minerva(Friend)CARR,
James P and Rebecca Martin (Boggs) CARR, Isaac CARR
Janathan Caldwell and Eliza Jane (Rugless) FRIEND, Thomas and Mary FRIEND, Jacob and Elizabeth (Skidmore) FRIEND, Isreal and Sarah FRIEND, Andrew and Isobel FRIEND

Please let me know if you find a match.