The Daugava (Daugova; Düna) or Western Dvina (Западная Двина; Заходняя Дзвіна; Väina; Väinäjoki) is a large river rising in the Valdai Hills of Russia that flows through Belarus and Latvia into the Gulf of Riga of the Baltic Sea. It rises close to the source of the Volga. It is in length, of which are in Latvia and are in Russia. It is a westward-flowing river, tracing out a great south-bending curve as it passes through northern Belarus.
Latvia's capital, Riga, bridges the river's estuary four times. Built on both riverbanks, the city centre is from the river's mouth and is a significant port.
According to Max Vasmer's Etymological Dictionary, the toponym Dvina cannot stem from a Uralic language; instead, it possibly comes from an Indo-European word which used to mean river or stream. The name Dvina resembles strongly Danuvius which itself derived from the Proto-Indo-European *dānu, meaning "large river".
The Finno-Ugric names Vēna