John Gunderson was a farmer in Romness Township until he retired and moved to Cooperstown.

He was born February 11, 1867 in Vernon County, Wisconsin. His father was Gunder Enersen and his mother was Marit Paulsen from Ringebu, Norway. They came to the United States before the Civil War.

John came to Griggs County in 1882 and continued living there while he farmed.

His wife was Thea Sletten, daughter of Ole Sletten and Oliana Johnson from Osterdalen, Norway. Her grandfather was Jo Jonson (possibly it could be John or Joseph Johnson according to a family tree record). Her grandmother's name is unknown. She was Jo Jonson's first wife.

Mrs. John Gunderson's sister was Olava (Mrs. Thorval Gunderson) and her two brothers:

John Sletten married to Sisila Idsvoog and Otto Sletten married to Marie Brekken.

Mrs. John Gunderson's father, Ole Sletten, was born January 7, 1838 at Aamodt, Norway and he died February 3, 1907. Her mother was Oliana Tollefsen (Johnson) born May 17, 1827 at Aamodt, Norway. She died March 25, 1911. (It is believed that they lived in Osterdalen, Norway and presumably her husband's name was Ole Johnson in Norway, but in United States known as Ole Sletten.) They have a joint headstone in the Ottawa Lutheran Church cemetery about 12 miles north of Cooperstown.

In the spring of 1866, John Haakenson Asprusten, known as John Hogenson in the United States, together with his aunt Oliana Johnson (later became Mrs. Ole Sletten) and John's cousin, Martin Johnson, left Norway for Fillmore Company, Minnesota, near Lanesboro and Rusford in the Root River Valley.

Mr. and Mrs. John Gunderson took homestead in 1883.

Their children are:

Oscar

Magnus

Jessie (Tweed) and Ella (Edland).

Source: Griggs County History 1879 - 1976 Page 391