When Fijke Slijm was born on 28 February 1833, in Nieuwolda, Groningen, Netherlands, her father, Uuldrik Alberts Slijm, was 34 and her mother, Geeske Geerts Hak, was 33. She married Geert Boekweg on 25 August 1855, in Noordbroek, Groningen, Netherlands. They were the parents of at least 3 sons and 2 daughters. She died on 19 February 1913, in Slochteren, Groningen, Netherlands, at the age of 79, and was buried in Groningen, Netherlands.