Dvina may refer to: (geography) The Western Dvina (also known as Daugava)'s a river in Russia, Belarus, and Latvia. (geography) The Northern Dvina's a river in northern Russia. (military) The R-12 Dvina's a theatre ballistic missile from the Soviet Union during the Cold War. (military) The S-75 Dvina's an surface-to-air guided missile from the Soviet Union during the Cold War. Therapsid reptile Dvinia… (More on Dvina)