Theodore B. Olson came to Dakota Territory from Decorah, Iowa in 1880, with his parents the Ole Bjornstad Olsons, brothers:
Gilbert, Martin and Bernt and a sister Mrs. John Torfin.
They made the trip by ox team. They settled in Romness Township.
Theodore Olson married Marie Thylie, who came to Dakota Territory with her father, Even P. Thylie, and sisters, Petra, Bertha and Caroline from Ettrick, Wisconsin. The Thylies settled on what is known now as the Alf Ueland farm.
The Olsons had six children:
ENNER O.
Melvin M.
Mabel Theoline (who passed away in infancy)
Oscar H. and Ruth (Mrs. Lawrence Monson) all of whom reside in Cooperstown.
Theodore, Martin and Bernt all had homes at what is known as Horse Hill in Romness Township. Gilbert lived about 21/2 miles further north. They all lived within three miles of the Ringsaker church, which was named for Ringsak, Norway, the area from which their father came.
Theodore Olson passed away in November 1931. His wife, Marie T. Olson, passed away in October 1962.
Source: Griggs County History 1879 - 1976 Page 404