John Siverson (severson)

Im trying to find out more about John Siverson. Specifically who his parents were and his birth location in Norway. here's what I know about him from the 1900 US Census report. I'm not sure if anybody can help me. I've dug through and can't seem to find him on any of the ship registrations. any help would be appreciated. Cheers. Head of house, widower birth: October 1850 Norway residence: 1900 Buffalo & Taopi Townships, Minnehaha, South Dakota, United States immigration: 1864