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A one-name study is a collection of living persons (''address, phone'') and other biographical (''census'') data about persons sharing a particular surname or patronymic name based on the name of one's father, grandfather or an even earlier male ancestor. Some researchers are satisfied to collect information and reconstructed '''lineages'''. By distinct '''branches''', we distinct '''family groups''' which do not appear to have a direct connection. The data of the different family trees can be manipulated by “FamilyGroups” which distinguish the '''unrelated groups'''.