Elbing / Elbląg

The Elbląg (German: Elbing) is a 14.5-kilometre (9.0 mi) river in northern Poland connecting Lake Drużno with the Vistula Lagoon. The eponymous city of Elbląg is situated on the river. The tributaries of the Elbląg include the Fiszewka, Kumiela and Tina.
The oldest known mention of the river in the form Ilfing comes from the report of sailor Wulfstan from the end of the 9th century. The report was included in The Voyages of Ohthere and Wulfstan which was written in Anglo-Saxon in King Alfred's reign.

Source: Wikipedia https://en.wikipedia.org/wiki/Elbląg_(river)