When Mathilda Lucile Anderegg was born on 4 September 1910, in Rexburg, Madison, Idaho, United States, her father, Peter Anderegg, was 40 and her mother, Margarita Staehli Roth, was 38. She married Willis A Liljenquist on 3 January 1928. She lived in Idaho Falls, Bonneville, Idaho, United States in 1930 and Pocatello Election Precinct 14, Bannock, Idaho, United States in 1940. She died on 28 March 1988, at the age of 77.