When Mariane Thomasdatter was born on 14 October 1821, in Jetsmark, Hjørring, Denmark, her father, Thomas Pedersen, was 53 and her mother, Ane Marie Olesdatter, was 26. She married Jens Bollesen on 1 January 1855. They were the parents of at least 3 sons and 2 daughters. She died on 23 November 1904, in her hometown, at the age of 83.