Ingvald married Thea Marie Evanger on 9 Oct 1915 in Sioux Falls, Minnehaha County, South Dakota, USA. Thea (daughter of Bryngel Helgesen Evangerhaug (Evanger) and Ingeborg Mathre) was born on 8 Apr 1896 in Bryant, Hamlin County, South Dakota, USA; died on 14 Oct 1954 in Tacoma, Pierce County, Washington, USA; was buried in Lakewood, Pierce County, Washington, USA. [Group Sheet] [Family Chart]

1. Norman Roger Olson was born on 18 Apr 1916 in Sioux Falls, Minnehaha County, South Dakota, USA; died on 20 Oct 2001 in Washington, USA; was buried in Lakewood, Pierce County, Washington, USA.
2. Helen G Olson
3. Margaret L Olson
4. Geraldine Olson
5. Alvin P Olson