Ostrobothnia, Swedish: Österbotten (literally "Eastern Bottom", "botten" deriving from Old Norse botn in the meaning of 'bay', and Latinized "bothnia"), Finnish: Pohjanmaa (literally "Bottom (low) lands" or alternatively "Northland") is a historical province comprising a large western and northern part of modern Finland (which was then the eastern half of Sweden). It is bounded by Karelia, Savonia, Tavastia and Satakunta in the south, the Bothnian Sea, Bothnian Bay and Swedish Westrobothnia in the west, Laponia in the north and Russia in the east.