Árni Þorfinnsson was born on November 5, 1877 in Skagafjarðarsýsla. He died in Mountain, N. Dakota on October 1, 1943.
Spouse: January 4, 1907 Sigríður Sigurðardóttir b. in Skagafjarðarsýsla on October 7, 1888, d. October 22, 1968.
Children: 1. Elmer b. January 9, 1908 2. Clarence b. September 9, 1910 3. Þorfinnur Moritz b. 1913 4. Thelma Margrét b. 1914 5. Steinunn b. 1916 6. Lynn b. 1918 7. Fred b. 1920 8. Sidney Arnold b. September 29, 1925 9. Richard Jónas b. October 12, 1927 10. Elizabeth Noreen b. December 13, 1930.
Árni came west in 1882 with his parents, Þorfinnur Jóhannesson and Elísabet Pétursdóttir, who settled in N. Dakota. Sigríður came west in 1899 with her parents, Sigurður Björnsson and Steinunn Jónasdóttir. Árni and Sigríður lived in the Thingvalla Settlement.