What is "schwennigke"

The Schwennigke, also Schwenke, is a river in Saxony, Germany, and a left-hand tributary of the Schnauder. It rises in the Gleinaer Grund and runs from Tröglitz for a distance of about 25 kilometres through the Elster water meadows parallel to the White Elster, before emptying into the Schnauder at Audigast near Groitzsch.