When Genevieve Cass was born on 20 April 1911, in Fairbanks Township, Renville, North Dakota, United States, her father, Jehiel Hiley Cass, was 43 and her mother, Effie Todd, was 23. She married Adolph C Brehe on 11 October 1933, in Pierre, Hughes, South Dakota, United States. They were the parents of at least 1 son. She lived in Sully, South Dakota, United States in 1935 and Garner Township, Sully, South Dakota, United States in 1940. She died in 2002, in Pueblo, Colorado, United States, at the age of 91, and was buried in Onida, Sully, South Dakota, United States.