- Birth Date
- 10 September 1837
- Death Date
- 9 April 1915
In some sources his surname is spelled "Martensen."
The Mortensen family came on the ship, Monarch of the Sea in 1864. The family consisted of father, Niels, mother, Kirsten P., and child: Ane Kirstine.
- Age at Departure: 26
- Head of Household
- 1870 Utah Census.
- 1880 Utah Census.
- Denmark, Baptisms, 1618-1923.
- Find a Grave
- 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), 330
- "List of Immigrants," Deseret News, 12 October 1864, 13.
- Saints By Sea: Latter-day Saint Immigration to America