Fergus Falls, MI, searching Seline

hello my great grandfather had a sister, Seline Andersdatter (Andersdtr.) Undseth born 15/4-1865 at Undset, Rendalen, Hedemark, Norway. She left Christiania (Oslo) June 14 and arr. New York June 28 1883 with SS. Heimdal, (agent Fredrik Lie) with given destination: Fergus Falls, Minnesota, she travelled the same date with others, not family, from Undseth, Rendalen. Just searhing the internettpaper of Fergus Falls give me a handfull today people with surnames Undseth, there has to be some kind of connections...can anybody give me some help or advise? thankful Morten Undseth, Norway