Meyers Orts- und Verkehrs-Lexikon des Deutschen Reichs (Meyers Gazetteer), online edition, with GOV (genealogy.net) for post-1945 Polish equivalents · meyersgaz.org / gov.genealogy.net
Blankenburg 3): Preussen, Prov Brandenburg, RB Potsdam, Kr Angermünde, AG Angermünde; myLatLng 53.21678, 13.93581
Only Blankenburg in Kr. Angermünde; child #4079 already sits on this point.