Research in Ostfriesland
http://www.tote-punkte-ostfriesland.de/ is a finding aid for East Frisian lineage books. Persons who disappear from a parish might be contained in this finding aid and birth, marriage, death and working place be given. Only the bare bones information is given for each person. To find further details, the actual lineage (Ortsfamilienbuch) has to be consulted. At this point around 120 OSBs exist for the area of which approx. half have been evaluated. The website of the OGF (Oldenburgische Gesellschaft - Familienforschung) has published a pdf-file which is accessible under "Download.