The data from the Common Standards File (Gemeinsame Normdatei = GND) of the German National Library (Deutsche Nationalbibliothek = DNB) can be used to enrich personal, institutional or organisational data. The DNB catalogue can be found at: https://portal.dnb.de/
Then click on "advanced search" in the menu on the left and then on the tab "locations/catalogues" in the lower register and, depending on the search query, check the box for persons or organisations:
Enter the name you are looking for in the search form under Person (or Organisation) and click on "Find" in the search form.
Then copy the ID behind http://d-nb.info/gnd/ and, analogous to the handling of the norm data of Geonames, enter GND in WissKI for person or institution in the group "norm data" under "norm file", then insert the ID. In this case, "GND" must be entered or selected under "Standards file".