Mumbling
Stumbern is the German name of the former East Prussian villages in the Russian Oblast Kaliningrad:
- Stumbern (1938–1946: Auersfeld), Goldap district, see Kamaritschi in Osjorsk Rajon
- Stumbern, Pillkallen district (1938–1946: Auertal, Schloßberg district), today in Krasnosnamensk district: the place no longer exists
- Stumbern, historical name of the village Groß Pillkallen , Ragnit / Tilsit-Ragnit district, East Prussia, now: Meschduretschje (Kaliningrad, Gussew) , settlement in Gussew Rajon