When Michael C Vonfeldt was born on 16 February 1891, in Victoria, Ellis, Kansas, United States, his father, Christian Vonfeldt, was 31 and his mother, Anna Maria ( Margaret) Kippes, was 25. He married Eva Richmeier on 4 May 1915, in Kansas, United States. They were the parents of at least 5 sons and 2 daughters. He lived in Cheyenne, Colorado, United States in 1935 and Election Precinct 2 St. Vrain, Weld, Colorado, United States in 1940. He died in May 1964, at the age of 73, and was buried in Longmont, Boulder, Colorado, United States.