When Cicilie Andersen was born on 2 July 1851, in Jetsmark, Hjørring, Denmark, her father, Anders Andersen, was 33 and her mother, Ane Kirstine Nielsdatter, was 40. She married Christian Peder Nielsen on 28 January 1873, in Vrensted, Hjørring, Denmark. They were the parents of at least 8 sons and 5 daughters. She lived in Tise, Børglum, Hjørring, Denmark in 1901 and Vrensted, Børglum, Hjørring, Denmark in 1911. She died on 9 January 1918, in Vrensted, Hjørring, Denmark, at the age of 66, and was buried in Jetsmark, Hjørring, Denmark.