When Maren Kirstine Andersen was born on 3 November 1889, in Harridslev, Vennebjerg, Hjørring, Denmark, her father, Christen Andersen, was 31 and her mother, Birthe Nielsen, was 25. She married Kristian Berg Nielsen on 17 December 1915. They were the parents of at least 1 son. She lived in Sejlstrup, Hjørring, Denmark in 1930. She died on 21 July 1956, at the age of 66.