When Kajsa Hansen Nilsson was born on 15 November 1779, in Kronoberg, Sweden, her father, Hans Jonasson, was 24 and her mother, Catherina Karin Svensson, was 29. She married Peter Nilsson in 1808, in Lekaryd, Kronoberg, Sweden. They were the parents of at least 2 sons and 4 daughters. She died on 17 January 1820, at the age of 40.