When Mari Olsdatter was born on 11 November 1766, in Asker, Akershus, Norway, her father, Ole Hansen, was 33 and her mother, Kirsti Andersdatter, was 35. She married Peder Pettersen Berger on 9 March 1794, in Asker, Akershus, Norway. They were the parents of at least 2 daughters. She died on 25 October 1794, in her hometown, at the age of 27, and was buried in Asker, Akershus, Norway.