When Anthon Frederik Hemmingsen was born on 3 June 1884, in Fanefjord, Møn, Denmark, his father, Christian Hemmingsen, was 39 and his mother, Bodil Kirstine Jensen, was 36. He married Nielsigne Petersen on 3 January 1914, in Minnehaha, South Dakota, United States. They were the parents of at least 1 son and 3 daughters. He lived in Fanefjord, Mønbo, Præstø, Denmark for about 11 years and Fremont Township, Moody, South Dakota, United States for about 10 years. He died on 11 April 1963, at the age of 78, and was buried in Greenwood Cemetery, Brookings Township, Brookings, South Dakota, United States.
Danish and Norwegian: patronymic from the personal name Hemming .