General Society of Mayflower Descendants
From Ancestry.com Wiki
The society is the national headquarters for the state organizations of descendants of Mayflower Pilgrims. It publishes the Mayflower Quarterly and the five-generation project (see Background Sources for Massachusetts). A research library is available. The Massachusetts Society of Mayflower Descendants, 100 Boylston St., #750, Boston, MA 02116-4610 also has a useful library.
An applicant for membership must be over eighteen years of age and show proof of direct descent from one of the Mayflower passengers listed below.
John Alden Isaac Allerton John Billington William Bradford William Brewster Peter Browne James Chilton Francis Cooke Edward Doty Francis Eaton Moses Fletcher Edward Fuller Samuel Fuller Stephen Hopkins John Howland Richard More William Mullins Degory Priest Thomas Rogers Henry Samson George Soule Myles Standish John Tilley Richard Warren William White Edward Winslow