Reintje Turksma was a daughter of Izaäk Turksma and Froukje van Leer. She married Karel van der Horst in 1900 in Smallingerland. Stadsarchief Amsterdam, archiefkaart Reintje Turksma
In addition, Jokos files (numbers 6929, 37627) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.