Gunvor Guggisberg - a Swiss singer knows professionally as Gunvor
Karlsson was born in Västerås, Sweden, and is the son of Hans Valter Karlsson (b. 1931) and Gunvor Agnes Matilda Kyller (b. 1938), and he grow up in the small town Hallstahammar, 2o km west of Västerås, in the province Västmanland.