When Muriel Joy Nottger was born on 16 November 1892, in Bremer, Iowa, United States, her father, Philip Charles Nottger, was 42 and her mother, Mary Elizabeth Clemens Clemans, was 38. She married Walter Frederick Duecker on 4 October 1923, in Charles City, Floyd, Iowa, United States. She died on 14 June 1986, in Daly City, San Mateo, California, United States, at the age of 93, and was buried in Harlington Cemetery, Waverly, Bremer, Iowa, United States.