My grandfather, Theodore Dahlen, born in 1886, came to the US from Norway in 1904 and died in 1959. His sons included my father, Theodore E, as well as Thomas (still alive), Earl (died as a baby), and Harvey (died around 1929 in a plane crash). Odds are we are not related. If your father is Theodore E, he might be the one who died in Hennepin County within a couple of weeks of my grandfather, who died in neighboring Ramsey County. More confusion between the two is due to the fact that my grandfather worked for Northern Pacific Railroad and lived along the route from Minneapolis to Staples, MN and into Fargo, Jamestown, and other North Dakota towns. For some odd reason, both of them seemed to be in close geographic proximity to each other.
Happy hunting! If you find anything about my grandfather, I would appreciate it.