Descent info: Lawrence descent from Charlemagne see Greene, David L. “The Royal Ancestry of the Ipswich (Massachusetts) and Long Island Lawrence Families” The Genealogist v. 10 No. 1(Apr 1989): 3-30]
The Greenes of Rhode Island, with historical Records of English Ancestry 1534-1902, compiled from the MSS. of the late Major-General George Sears Greene, U.S.V., by Louise Brownell Clarke, Member of the New York Genealogical and Biographical Society and the Long Iland Historical Society, New York 1903. Copies of Volumn I & II in the possession of Edward D. Ellis, 2016 N. Vermont, Royal Oak, Michigan 48073-4257.