Ruth Engebritsen married Henry Paul Lanthier in Carlton County on September 14, 1929. She died in St. Louis County on June 15, 1962. I don't know if she had children. In the 1930 census, there is a Ruth married to Albert Lanthier, but it is not your Ruth. Albert was Henry Paul's brother, and he also married a Ruth. I don't find Ruth and Henry in the 1930 census, it is possible their name was mangled in the transription.
Here is Albert's obit from the Duluth News Tribune
December 19, 1917
A.C. Engebritson passes away after brief illness.
Albert C. Engebritson, age 66, an old resident of Proctor died yesterday morning after a short illness. He is survived by the widow, two daughters, Esther and Ruth, and three sons, Clark and Andrew of Glenwood,Minn. and Louis of Duluth. He also leaves two brothers, Charles and Edward Engebritson of Proctor. The body was taken to Belt Brother's undertaking rooms and funeral arrangements will be made later.
There was a later article that said he was buried at Oneota Cemetery. The database I use only goes up to about 1922 for Duluth.