- Birth Date
- 2 April 1812
- Death Date
- 29 June 1897
born near Skiva, Viborg, Denmark
In some sources his surname is spelled "Willardson."
- Age at Departure: 41
- 1870 Utah Census, Sanpete County.
- Anthon H. Lund, Scandinavian Jubilee Album (Salt Lake City: Deseret News, 1900).
- Lever, W. H. History of Sanpete and Emery Counties, Utah: With Sketches of Cities, Towns, and Villages; Chronology of Important Events; Records of Indian Wars; Portraits of Prominent Persons, and Biographies of Representative Citizens (Salt Lake City: Tribune Job Printing Co, 1898), 349
- Manuscript history of the John E. Forsgren Emigrating Company, circa 1930, 18-35.