Katrineholm (pronunciation: or ) is a locality and the seat of Katrineholm Municipality, Södermanland County, Sweden with 24,271 inhabitants in 2018. It is located in the inland of Södermanland and is the third largest urban area in the county after Eskilstuna and county seat Nyköping. History. Early history. The name Katrineholm comes from a ducal residence with this name, after Catherina Gyllenhorn who lived there. The settlement started growing when it became a railway junction connecting the railways Stockholm - Gothenburg), and Stockholm - Malmö.
https://en.wikipedia.org/wiki/Katrineholm