Mari Kopperdahl was born on 9 May 1866; died in Bet. 1867 and 1960.
Serina Kopperdahl was born on 9 May 1868 in Minnesota, United States; died on 4 Nov 1900 in Anamoose, McHenry, North Dakota, United States; was buried on 6 Nov 1900 in Anamoose, McHenry, North Dakota, United States.
Ole Kopperdahl was born on 15 Oct 1869; died in Bet. 1890 and 1959.