When Kierstin Pehrsdotter was born on 30 March 1721, in Mårtensboda, Västerbotten, Sweden, her father, Per Persson, was 24 and her mother, Anna Andersdotter, was 20. She married Stephan Olofsson on 19 November 1745, in Burträsk, Västerbotten, Sweden. They were the parents of at least 4 sons and 5 daughters. She died on 26 June 1802, in her hometown, at the age of 81, and was buried in Lövånger, Västerbotten, Sweden.