1658John Jackson gave his son-in-law John Briars two or three acres of land in an area called Peter Mud’s Neck, now known as Rocky Neck.Economy and Industry, Location and Setting, Land Ownership, Neighborhoods
Early maps show the area labelled Peter Mud’s Neck. Unfortunately, there is no early record of Peter Mud.
Babson, John James, and Samuel Chandler. History of the Town of Gloucester, Cape Anne, Including the Town of Rockport. Procter Brothers, 1860, http://archive.org/details/historytownglou00changoog