The Mandeville YDNA project welcomes all prospective participants with the surname (of all variant spellings) in all parts of the world. This is a Y DNA project, so direct participation must be by males. Females of Mandeville paternal ancestry may take part, with equally useful results, by having their brother, father, Mandeville-surname uncle or cousin contribute a sample. This project was first started in May, 2007 with a new project manager as of February 2023. ALL MEMBERS ARE ENCOURAGED TO TEST, AT A MINIMUM, OF Y-37 AND PREFERABLY BIG Y-700. Eventually, it is hoped to determine the proximity of relationships, if any, among Mandevilles in the U.S., England, France, the Netherlands and elsewhere in the world. PRIVACY ISSUES AND CONCERNS: DNA results of participants will not be shown publicly with personal identification unless express permission is provided by each person concerned. Without such permission, results will be posted anonymously as, for example ‘Participant 5’ or (and preferably) the name of the earliest known ancestor, e.g. ‘Line of David, brother of Gillis Jansen de Mandeville, b. ca. 1626.’ Updated: 3 March 2023