Society of Mayflower Descendants chapter operating within the State of Rhode Island and Providence Plantations under the governance of The General Society of Mayflower Descendants. smdri, smd-ri, mayflower society ri, ri mayflower society, rhode island mayflower society, mayflower society rhode island, mayflower societies, mayflower genealogy, mayflower descendants, mayflower passengers, pilgrims, pilgrim genealogy, pilgrim descendants, pilgrim roots, plymouth, plimoth, plymouth colony, plimoth colony, Mayflower Compact, Massachusetts history, thanksgiving, first Thanksgiving, general socity of mayflower descendants.