Nels Ole Nygaard or Ole Nels Nygaard

Nels Ole Nygaard b Jul 1853, d 2 Nov 1940 in Underwood, Otter Tail, Minnesota and his wife Gjertrud ??? b Sep 1851, d 13 Apr 1934 also in Underwood. came from Norway with their daughter Carrie (poss Carolina) C Nygaard b Apr 1878 married Martin Mortenson of Minnesota. Carrie died 10 Nov 1913 in Underwood. As far as I can tell, those 3 were the only ones who came over. That was abt 1881. I don't know what their norwegian names were, Nygaard is all I have. I would appreciate any information. Oh, yeah, I'm not sure if Gjertrud and Carrie came the same time or a year later.