I can only translate the literal meaning: "Sved" is a verb and means to scorch (with fire for example) and "berg" means mountain. We have a lot of these names in Sweden that doesn't make much sense (especially as the grammar form doesn't say Scorched Mountain but jost Scorch Mountain). I think a lot of them came up in the time when the lower classes started using familiy names instead of their parents names followed by -son and -dotter (daughter). That was in the 19th and early 20th century. Up to that Erik Svensson's son would take the name Olof Eriksson and his son Rune Olofsson, for example.