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
Sydow 2) Kr. Schlawe (A u. B) | Schlawe, Köslin, Pommern, Preussen
Meyers page fetched this session; Nominatim reverse-geocode of the point independently returns Żydowo, gmina Polanów.