Just out of curiosity, the "Jeffers" family you mention in your post,
do you know where they moved down from? The Jeffers surname has been long associated with the Aquinnah-Wampanoag people on Martha's Vineyard. So far, the Aquinnahs are the only fed-recognized native people of Massachusetts. Primarily mariners: whalers, fishermen
http://history.vineyard.net/dukes/gh1860.htm